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24
4
我目前正在编写一个程序，打算从 url 中读取并打印出有关天气的信息。省略实际与 url 建立连接的代码行，这里是循环遍历给定 url 上显示的信息以及相关变量的循环:
FILE *f = fdopen(sockfd, "r+");
char line[1000];
int count = 0;
int i;
char otime[200];
float temp;
int hum;
char dir[10];
float speed;
int fcastTempHi;
int fcastTempLo;
char wkday1[40];
char wkday2[20];
char wkday3[20];
char wkday4[20];
while(fgets(line, 1000, f) != NULL)
{
sscanf(line, "\t\t\"observation_time\":\"%[^\"]\",", otime);
sscanf(line, "\t\t\"temp_f\":%f\",", &temp);
sscanf(line, "\t\t\"relative_humidity\":\"%d\",", &hum);
sscanf(line, "\t\t\"wind_dir\":\"%[^\"]\",", dir);
sscanf(line, "\t\t\"wind_mph\":%f\",", &speed);
sscanf(line, "\t\t\"period\":1,");
}
printf("Current Conditions\n");
printf("Observation time: %s\n", otime);
printf("Temperature: %f F\n", temp);
printf("Humidity: %d%%\n", hum);
printf("Wind: %s %f mph\n\n", dir, speed);
printf("Forecast\n");
//printf("%s:\n", wkday1);
fclose(f);
假设我扫描的所有值都存在于显示的 url 内容中，但我将只包括我现在感兴趣的内容；阅读自
"period":1,
"high": {
"fahrenheit":"69",
"celsius":"20"
},
"low": {
"fahrenheit":"49",
"celsius":"9"
},
"weekday_short":"Sat",
"weekday":"Saturday",
我正在尝试定位“period”:1 行，如果找到，我想继续定位“weekday”:“string”，稍后打印该字符串。不幸的是，我正在扫描的另一行看起来像
"period":1,
"icon":"nt_partlycloudy",
并且这些行比我正在寻找的周期 1 出现得早得多。我特别寻找“期间”:1 而不仅仅是扫描“工作日”的原因是因为工作日显示多次，因为这是 10 天的天气预报。所以我想要包含我需要的工作日的特定时间段(时间段:1)而不是其他时间段(时间段:2、3、4、5、6 ...等)，因为这些时间段包含接下来的工作日。
我曾尝试使用 if 语句，但这只能找到两次出现的“period:1”，之后我无法扫描任何内容。
一旦发现“period”:1 的第一个实例，我就尝试了 fork，但这没有用(很可能是因为我缺乏经验和对 fork 的普遍无知)。
为了使帖子简短，我将排除我尝试过的其他方法，但我会说我已经让程序至少识别出有两行是“period”:1，虽然我不是确定如何解决这个问题，以便我可以扫描第二个“period”实例之后的行:1，。预先感谢您的任何回复。
来源更多:
{
"response": {
"version":"0.1",
"termsofService":"REDACTED",
"features": {
"conditions": 1
,
"forecast10day": 1
}
}
, "current_observation": {
"image": {
"url":"REDACTED",
"title":"REDACTED",
"link":"REDACTED"
},
"display_location": {
"full":"REDACTED",
"city":"REDACTED",
"state":"REDACTED",
"state_name":"REDACTED",
"country":"US",
"country_iso3166":"US",
"zip":"REDACTED",
"magic":"1",
"wmo":"99999",
"latitude":"REDACTED",
"longitude":"REDACTED",
"elevation":"REDACTED"
},
"observation_location": {
"full":"REDACTED",
"city":"REDACTED",
"state":"REDACTED",
"country":"US",
"country_iso3166":"US",
"latitude":"REDACTED",
"longitude":"REDACTED",
"elevation":"705 ft"
},
"estimated": {
},
"station_id":"REDACTED",
"observation_time":"Last Updated on May 15, 4:17 PM PDT",
"observation_time_rfc822":"Fri, 15 May 2015 16:17:57 -0700",
"observation_epoch":"1431731877",
"local_time_rfc822":"Fri, 15 May 2015 16:18:17 -0700",
"local_epoch":"1431731897",
"local_tz_short":"PDT",
"local_tz_long":"REDACTED",
"local_tz_offset":"-0700",
"weather":"Partly Cloudy",
"temperature_string":"68.3 F (20.2 C)",
"temp_f":68.3,
"temp_c":20.2,
"relative_humidity":"53%",
"wind_string":"From the South at 3.2 MPH Gusting to 6.5 MPH",
"wind_dir":"South",
"wind_degrees":185,
"wind_mph":3.2,
"wind_gust_mph":"6.5",
"wind_kph":5.1,
"wind_gust_kph":"10.5",
"pressure_mb":"1011",
"pressure_in":"29.87",
"pressure_trend":"-",
"dewpoint_string":"51 F (11 C)",
"dewpoint_f":51,
"dewpoint_c":11,
"heat_index_string":"NA",
"heat_index_f":"NA",
"heat_index_c":"NA",
"windchill_string":"NA",
"windchill_f":"NA",
"windchill_c":"NA",
"feelslike_string":"68.3 F (20.2 C)",
"feelslike_f":"68.3",
"feelslike_c":"20.2",
"visibility_mi":"10.0",
"visibility_km":"16.1",
"solarradiation":"--",
"UV":"7","precip_1hr_string":"0.00 in ( 0 mm)",
"precip_1hr_in":"0.00",
"precip_1hr_metric":" 0",
"precip_today_string":"-999.00 in (-25375 mm)",
"precip_today_in":"-999.00",
"precip_today_metric":"--",
"icon":"partlycloudy",
"icon_url":"REDACTED",
"forecast_url":"REDACTED",
"history_url":"REDACTED",
"ob_url":"REDACTED",
"nowcast":""
}
,
"forecast":{
"txt_forecast": {
"date":"2:52 PM PDT",
"forecastday": [
{
"period":0,
"icon":"partlycloudy",
"icon_url":"REDACTED",
"title":"Friday",
"fcttext":"Partly cloudy. Lows overnight in the upper 40s.",
"fcttext_metric":"Partly cloudy. Low 9C.",
"pop":"0"
}
,
{
"period":1,
"icon":"nt_partlycloudy",
"icon_url":"REDACTED",
"title":"Friday Night",
"fcttext":"Some passing clouds. Low 49F. Winds SSE at 5 to 10 mph.",
"fcttext_metric":"Partly cloudy. Low 9C. Winds SSE at 10 to 15 km/h.",
"pop":"0"
}
,
{
"period":2,
"icon":"partlycloudy",
"icon_url":"REDACTED",
"title":"Saturday",
"fcttext":"Sunshine and clouds mixed. High 76F. Winds SSW at 5 to 10 mph.",
"fcttext_metric":"Sunshine and clouds mixed. High 24C. Winds SSW at 10 to 15 km/h.",
"pop":"0"
}
,
{
"period":3,
"icon":"nt_partlycloudy",
"icon_url":"REDACTED",
"title":"Saturday Night",
"fcttext":"A few clouds from time to time. Low 49F. Winds S at 5 to 10 mph.",
"fcttext_metric":"Partly cloudy skies. Low 9C. Winds S at 10 to 15 km/h.",
"pop":"10"
}
,
{
"period":4,
"icon":"mostlycloudy",
"icon_url":"REDACTED",
"title":"Sunday",
"fcttext":"More clouds than sun. High 74F. Winds SSW at 5 to 10 mph.",
"fcttext_metric":"Mainly cloudy. High 23C. Winds SSW at 10 to 15 km/h.",
"pop":"10"
}
,
{
"period":5,
"icon":"nt_partlycloudy",
"icon_url":"REDACTED",
"title":"Sunday Night",
"fcttext":"Mostly cloudy skies early will become partly cloudy late. Low around 50F. Winds S at 5 to 10 mph.",
"fcttext_metric":"Mostly cloudy skies early, then partly cloudy after midnight. Low near 10C. Winds S at 10 to 15 km/h.",
"pop":"10"
}
,
{
"period":6,
"icon":"clear",
"icon_url":"REDACTED",
"title":"Monday",
"fcttext":"A few passing clouds, otherwise generally sunny. High 74F. Winds SSW at 10 to 15 mph.",
"fcttext_metric":"A few clouds early, otherwise mostly sunny. High 24C. Winds SSW at 15 to 25 km/h.",
"pop":"10"
}
,
{
"period":7,
"icon":"nt_partlycloudy",
"icon_url":"REDACTED",
"title":"Monday Night",
"fcttext":"Partly cloudy skies. Low around 50F. Winds S at 10 to 15 mph.",
"fcttext_metric":"A few clouds from time to time. Low near 10C. Winds S at 15 to 25 km/h.",
"pop":"10"
}
,
{
"period":8,
"icon":"partlycloudy",
"icon_url":"REDACTED",
"title":"Tuesday",
"fcttext":"Partly cloudy skies. High 74F. Winds S at 10 to 15 mph.",
"fcttext_metric":"Some clouds in the morning will give way to mainly sunny skies for the afternoon. High 24C. Winds S at 15 to 25 km/h.",
"pop":"10"
}
,
{
"period":9,
"icon":"nt_clear",
"icon_url":"REDACTED",
"title":"Tuesday Night",
"fcttext":"Clear. Low near 50F. Winds S at 10 to 15 mph.",
"fcttext_metric":"A mostly clear sky. Low near 10C. Winds S at 15 to 25 km/h.",
"pop":"10"
}
,
{
"period":10,
"icon":"clear",
"icon_url":"REDACTED",
"title":"Wednesday",
"fcttext":"Sun and a few passing clouds. High 77F. Winds SSW at 5 to 10 mph.",
"fcttext_metric":"Sunshine along with some cloudy intervals. High near 25C. Winds SSW at 10 to 15 km/h.",
"pop":"10"
}
,
{
"period":11,
"icon":"nt_clear",
"icon_url":"REDACTED",
"title":"Wednesday Night",
"fcttext":"Mainly clear skies. Low 51F. Winds S at 5 to 10 mph.",
"fcttext_metric":"Mainly clear skies. Low 11C. Winds S at 10 to 15 km/h.",
"pop":"20"
}
,
{
"period":12,
"icon":"partlycloudy",
"icon_url":"REDACTED",
"title":"Thursday",
"fcttext":"Sunshine and clouds mixed. High 77F. Winds SSW at 5 to 10 mph.",
"fcttext_metric":"Intervals of clouds and sunshine. High near 25C. Winds SSW at 10 to 15 km/h.",
"pop":"10"
}
,
{
"period":13,
"icon":"nt_chancetstorms",
"icon_url":"REDACTED",
"title":"Thursday Night",
"fcttext":"Isolated thunderstorms during the evening, then partly cloudy overnight. Low 53F. Winds S at 5 to 10 mph. Chance of rain 30%.",
"fcttext_metric":"Widely scattered showers or a thunderstorm early. Then partly cloudy. Low 12C. Winds S at 10 to 15 km/h. Chance of rain 30%.",
"pop":"30"
}
{
"period":14,
"icon":"clear",
"icon_url":"REDACTED",
"title":"Friday",
"fcttext":"Mostly sunny skies. High 78F. Winds SSW at 5 to 10 mph.",
"fcttext_metric":"Sunshine. High around 25C. Winds SSW at 10 to 15 km/h.",
"pop":"10"
}
,
{
"period":15,
"icon":"nt_clear",
"icon_url":"REDACTED",
"title":"Friday Night",
"fcttext":"A mostly clear sky. Low 54F. Winds S at 5 to 10 mph.",
"fcttext_metric":"Clear skies. Low 12C. Winds S at 10 to 15 km/h.",
"pop":"10"
}
,
{
"period":16,
"icon":"clear",
"icon_url":"REDACTED",
"title":"Saturday",
"fcttext":"Mainly sunny. High 81F. Winds SSW at 5 to 10 mph.",
"fcttext_metric":"Sunny skies. High 27C. Winds SSW at 10 to 15 km/h.",
"pop":"10"
}
,
{
"period":17,
"icon":"nt_clear",
"icon_url":"REDACTED",
"title":"Saturday Night",
"fcttext":"A few clouds from time to time. Low 53F. Winds S at 5 to 10 mph.",
"fcttext_metric":"Mostly clear skies. Low 12C. Winds S at 10 to 15 km/h.",
"pop":"10"
}
,
{
"period":18,
"icon":"clear",
"icon_url":"REDACTED",
"title":"Sunday",
"fcttext":"Mostly sunny skies. High 82F. Winds SSW at 5 to 10 mph.",
"fcttext_metric":"A few clouds from time to time. High 28C. Winds SSW at 10 to 15 km/h.",
"pop":"10"
}
,
{
"period":19,
"icon":"nt_clear",
"icon_url":"REDACTED",
"title":"Sunday Night",
"fcttext":"Mostly clear. Low 53F. Winds SSE at 5 to 10 mph.",
"fcttext_metric":"A mostly clear sky. Low 12C. Winds SSE at 10 to 15 km/h.",
"pop":"10"
}
]
},
"simpleforecast": {
"forecastday": [
{"date":{
"epoch":"1431741600",
"pretty":"7:00 PM PDT on May 15, 2015",
"day":15,
"month":5,
"year":2015,
"yday":134,
"hour":19,
"min":"00",
"sec":0,
"isdst":"1",
"monthname":"May",
"monthname_short":"May",
"weekday_short":"Fri",
"weekday":"Friday",
"ampm":"PM",
"tz_short":"PDT",
"tz_long":"REDACTED"
},
"period":1,
"high": {
"fahrenheit":"69",
"celsius":"20"
},
"low": {
"fahrenheit":"49",
"celsius":"9"
},
"conditions":"Partly Cloudy",
"icon":"partlycloudy",
"icon_url":"REDACTED",
"skyicon":"",
"pop":0,
"qpf_allday": {
"in": 0.00,
"mm": 0
},
"qpf_day": {
"in": null,
"mm": null
},
"qpf_night": {
"in": 0.00,
"mm": 0
},
"snow_allday": {
"in": 0.0,
"cm": 0.0
},
"snow_day": {
"in": null,
"cm": null
},
"snow_night": {
"in": 0.0,
"cm": 0.0
},
"maxwind": {
"mph": 8,
"kph": 13,
"dir": "",
"degrees": 0
},
"avewind": {
"mph": 1,
"kph": 2,
"dir": "South",
"degrees": 186
},
"avehumidity": 73,
"maxhumidity": 0,
"minhumidity": 0
}
,
{"date":{
"epoch":"1431828000",
"pretty":"7:00 PM PDT on May 16, 2015",
"day":16,
"month":5,
"year":2015,
"yday":135,
"hour":19,
"min":"00",
"sec":0,
"isdst":"1",
"monthname":"May",
"monthname_short":"May",
"weekday_short":"Sat",
"weekday":"Saturday",
"ampm":"PM",
"tz_short":"PDT",
"tz_long":"REDACTED"
},
"period":2,
"high": {
"fahrenheit":"76",
"celsius":"24"
},
"low": {
"fahrenheit":"49",
"celsius":"9"
},
"conditions":"Partly Cloudy",
"icon":"partlycloudy",
"icon_url":"REDACTED",
"skyicon":"",
"pop":0,
"qpf_allday": {
"in": 0.00,
"mm": 0
},
"qpf_day": {
"in": 0.00,
"mm": 0
},
"qpf_night": {
"in": 0.00,
"mm": 0
},
"snow_allday": {
"in": 0.0,
"cm": 0.0
},
"snow_day": {
"in": 0.0,
"cm": 0.0
},
"snow_night": {
"in": 0.0,
"cm": 0.0
},
"maxwind": {
"mph": 10,
"kph": 16,
"dir": "SSW",
"degrees": 196
},
"avewind": {
"mph": 8,
"kph": 13,
"dir": "SSW",
"degrees": 196
},
"avehumidity": 54,
"maxhumidity": 0,
"minhumidity": 0
}
,
{"date":{
"epoch":"1431914400",
"pretty":"7:00 PM PDT on May 17, 2015",
"day":17,
"month":5,
"year":2015,
"yday":136,
"hour":19,
"min":"00",
"sec":0,
"isdst":"1",
"monthname":"May",
"monthname_short":"May",
"weekday_short":"Sun",
"weekday":"Sunday",
"ampm":"PM",
"tz_short":"PDT",
"tz_long":"REDACTED"
},
"period":3,
"high": {
"fahrenheit":"74",
"celsius":"23"
},
"low": {
"fahrenheit":"50",
"celsius":"10"
},
"conditions":"Mostly Cloudy",
"icon":"mostlycloudy",
"icon_url":"REDACTED",
"skyicon":"",
"pop":10,
"qpf_allday": {
"in": 0.00,
"mm": 0
},
"qpf_day": {
"in": 0.00,
"mm": 0
},
"qpf_night": {
"in": 0.00,
"mm": 0
},
"snow_allday": {
"in": 0.0,
"cm": 0.0
},
"snow_day": {
"in": 0.0,
"cm": 0.0
},
"snow_night": {
"in": 0.0,
"cm": 0.0
},
"maxwind": {
"mph": 10,
"kph": 16,
"dir": "SSW",
"degrees": 192
},
"avewind": {
"mph": 9,
"kph": 14,
"dir": "SSW",
"degrees": 192
},
"avehumidity": 54,
"maxhumidity": 0,
"minhumidity": 0
}
,
{"date":{
"epoch":"1432000800",
"pretty":"7:00 PM PDT on May 18, 2015",
"day":18,
"month":5,
"year":2015,
"yday":137,
"hour":19,
"min":"00",
"sec":0,
"isdst":"1",
"monthname":"May",
"monthname_short":"May",
"weekday_short":"Mon",
"weekday":"Monday",
"ampm":"PM",
"tz_short":"PDT",
"tz_long":"REDACTE"
},
"period":4,
"high": {
"fahrenheit":"74",
"celsius":"23"
},
"low": {
"fahrenheit":"50",
"celsius":"10"
},
"conditions":"Clear",
"icon":"clear",
"icon_url":"REDACTED",
"skyicon":"",
"pop":10,
"qpf_allday": {
"in": 0.00,
"mm": 0
},
"qpf_day": {
"in": 0.00,
"mm": 0
},
"qpf_night": {
"in": 0.00,
"mm": 0
},
"snow_allday": {
"in": 0.0,
"cm": 0.0
},
"snow_day": {
"in": 0.0,
"cm": 0.0
},
"snow_night": {
"in": 0.0,
"cm": 0.0
},
"maxwind": {
"mph": 15,
"kph": 24,
"dir": "SSW",
"degrees": 209
},
"avewind": {
"mph": 10,
"kph": 16,
"dir": "SSW",
"degrees": 209
},
"avehumidity": 52,
"maxhumidity": 0,
"minhumidity": 0
}
,
{"date":{
"epoch":"1432087200",
"pretty":"7:00 PM PDT on May 19, 2015",
"day":19,
"month":5,
"year":2015,
"yday":138,
"hour":19,
"min":"00",
"sec":0,
"isdst":"1",
"monthname":"May",
"monthname_short":"May",
"weekday_short":"Tue",
"weekday":"Tuesday",
"ampm":"PM",
"tz_short":"PDT",
"tz_long":"REDACTED"
},
"period":5,
"high": {
"fahrenheit":"74",
"celsius":"23"
},
"low": {
"fahrenheit":"50",
"celsius":"10"
},
"conditions":"Partly Cloudy",
"icon":"partlycloudy",
"icon_url":"REDACTED",
"skyicon":"",
"pop":10,
"qpf_allday": {
"in": 0.00,
"mm": 0
},
"qpf_day": {
"in": 0.00,
"mm": 0
},
"qpf_night": {
"in": 0.00,
"mm": 0
},
"snow_allday": {
"in": 0.0,
"cm": 0.0
},
"snow_day": {
"in": 0.0,
"cm": 0.0
},
"snow_night": {
"in": 0.0,
"cm": 0.0
},
"maxwind": {
"mph": 15,
"kph": 24,
"dir": "S",
"degrees": 190
},
"avewind": {
"mph": 10,
"kph": 16,
"dir": "S",
"degrees": 190
},
"avehumidity": 55,
"maxhumidity": 0,
"minhumidity": 0
}
,
{"date":{
"epoch":"1432173600",
"pretty":"7:00 PM PDT on May 20, 2015",
"day":20,
"month":5,
"year":2015,
"yday":139,
"hour":19,
"min":"00",
"sec":0,
"isdst":"1",
"monthname":"May",
"monthname_short":"May",
"weekday_short":"Wed",
"weekday":"Wednesday",
"ampm":"PM",
"tz_short":"PDT",
"tz_long":"REDACTED"
},
"period":6,
"high": {
"fahrenheit":"77",
"celsius":"25"
},
"low": {
"fahrenheit":"51",
"celsius":"11"
},
"conditions":"Clear",
"icon":"clear",
"icon_url":"REDACTED",
"skyicon":"",
"pop":10,
"qpf_allday": {
"in": 0.00,
"mm": 0
},
"qpf_day": {
"in": 0.00,
"mm": 0
},
"qpf_night": {
"in": 0.00,
"mm": 0
},
"snow_allday": {
"in": 0.0,
"cm": 0.0
},
"snow_day": {
"in": 0.0,
"cm": 0.0
},
"snow_night": {
"in": 0.0,
"cm": 0.0
},
"maxwind": {
"mph": 10,
"kph": 16,
"dir": "SSW",
"degrees": 196
},
"avewind": {
"mph": 9,
"kph": 14,
"dir": "SSW",
"degrees": 196
},
"avehumidity": 54,
"maxhumidity": 0,
"minhumidity": 0
}
,
{"date":{
"epoch":"1432260000",
"pretty":"7:00 PM PDT on May 21, 2015",
"day":21,
"month":5,
"year":2015,
"yday":140,
"hour":19,
"min":"00",
"sec":0,
"isdst":"1",
"monthname":"May",
"monthname_short":"May",
"weekday_short":"Thu",
"weekday":"Thursday",
"ampm":"PM",
"tz_short":"PDT",
"tz_long":"REDACTED"
},
"period":7,
"high": {
"fahrenheit":"77",
"celsius":"25"
},
"low": {
"fahrenheit":"53",
"celsius":"12"
},
"conditions":"Partly Cloudy",
"icon":"partlycloudy",
"icon_url":"REDACTED",
"skyicon":"",
"pop":10,
"qpf_allday": {
"in": 0.00,
"mm": 0
},
"qpf_day": {
"in": 0.00,
"mm": 0
},
"qpf_night": {
"in": 0.00,
"mm": 0
},
"snow_allday": {
"in": 0.0,
"cm": 0.0
},
"snow_day": {
"in": 0.0,
"cm": 0.0
},
"snow_night": {
"in": 0.0,
"cm": 0.0
},
"maxwind": {
"mph": 10,
"kph": 16,
"dir": "SSW",
"degrees": 195
},
"avewind": {
"mph": 8,
"kph": 13,
"dir": "SSW",
"degrees": 195
},
"avehumidity": 53,
"maxhumidity": 0,
"minhumidity": 0
}
,
{"date":{
"epoch":"1432346400",
"pretty":"7:00 PM PDT on May 22, 2015",
"day":22,
"month":5,
"year":2015,
"yday":141,
"hour":19,
"min":"00",
"sec":0,
"isdst":"1",
"monthname":"May",
"monthname_short":"May",
"weekday_short":"Fri",
"weekday":"Friday",
"ampm":"PM",
"tz_short":"PDT",
"tz_long":"REDACTED"
},
"period":8,
"high": {
"fahrenheit":"78",
"celsius":"26"
},
"low": {
"fahrenheit":"54",
"celsius":"12"
},
"conditions":"Clear",
"icon":"clear",
"icon_url":"REDACTED",
"skyicon":"",
"pop":10,
"qpf_allday": {
"in": 0.00,
"mm": 0
},
"qpf_day": {
"in": 0.00,
"mm": 0
},
"qpf_night": {
"in": 0.00,
"mm": 0
},
"snow_allday": {
"in": 0.0,
"cm": 0.0
},
"snow_day": {
"in": 0.0,
"cm": 0.0
},
"snow_night": {
"in": 0.0,
"cm": 0.0
},
"maxwind": {
"mph": 10,
"kph": 16,
"dir": "SSW",
"degrees": 208
},
"avewind": {
"mph": 8,
"kph": 13,
"dir": "SSW",
"degrees": 208
},
"avehumidity": 59,
"maxhumidity": 0,
"minhumidity": 0
}
,
{"date":{
"epoch":"1432432800",
"pretty":"7:00 PM PDT on May 23, 2015",
"day":23,
"month":5,
"year":2015,
"yday":142,
"hour":19,
"min":"00",
"sec":0,
"isdst":"1",
"monthname":"May",
"monthname_short":"May",
"weekday_short":"Sat",
"weekday":"Saturday",
"ampm":"PM",
"tz_short":"PDT",
"tz_long":"REDACTED"
},
"period":9,
"high": {
"fahrenheit":"81",
"celsius":"27"
},
"low": {
"fahrenheit":"53",
"celsius":"12"
},
"conditions":"Clear",
"icon":"clear",
"icon_url":"REDACTED",
"skyicon":"",
"pop":10,
"qpf_allday": {
"in": 0.00,
"mm": 0
},
"qpf_day": {
"in": 0.00,
"mm": 0
},
"qpf_night": {
"in": 0.00,
"mm": 0
},
"snow_allday": {
"in": 0.0,
"cm": 0.0
},
"snow_day": {
"in": 0.0,
"cm": 0.0
},
"snow_night": {
"in": 0.0,
"cm": 0.0
},
"maxwind": {
"mph": 10,
"kph": 16,
"dir": "SSW",
"degrees": 202
},
"avewind": {
"mph": 9,
"kph": 14,
"dir": "SSW",
"degrees": 202
},
"avehumidity": 57,
"maxhumidity": 0,
"minhumidity": 0
}
,
{"date":{
"epoch":"1432519200",
"pretty":"7:00 PM PDT on May 24, 2015",
"day":24,
"month":5,
"year":2015,
"yday":143,
"hour":19,
"min":"00",
"sec":0,
"isdst":"1",
"monthname":"May",
"monthname_short":"May",
"weekday_short":"Sun",
"weekday":"Sunday",
"ampm":"PM",
"tz_short":"PDT",
"tz_long":"REDACTED"
},
"period":10,
"high": {
"fahrenheit":"82",
"celsius":"28"
},
"low": {
"fahrenheit":"53",
"celsius":"12"
},
"conditions":"Clear",
"icon":"clear",
"icon_url":"REDACTED",
"skyicon":"",
"pop":10,
"qpf_allday": {
"in": 0.00,
"mm": 0
},
"qpf_day": {
"in": 0.00,
"mm": 0
},
"qpf_night": {
"in": 0.00,
"mm": 0
},
"snow_allday": {
"in": 0.0,
"cm": 0.0
},
"snow_day": {
"in": 0.0,
"cm": 0.0
},
"snow_night": {
"in": 0.0,
"cm": 0.0
},
"maxwind": {
"mph": 10,
"kph": 16,
"dir": "SSW",
"degrees": 206
},
"avewind": {
"mph": 9,
"kph": 14,
"dir": "SSW",
"degrees": 206
},
"avehumidity": 55,
"maxhumidity": 0,
"minhumidity": 0
}
]
}
}
}
我已经更新了源中的所有数据。
最佳答案
据我所知，您正在尝试检查是否有两个 "period": 1 实例，如果有，请读取另一个值。在那种情况下，我相信这样的事情应该有效:
#include <stdio.h>
#include <stdbool.h>
int main()
{
// I stored the data in weather.txt, you'll have to change this
FILE *f = fopen("weather.txt", "r+");
char line[1000];
int count = 0;
int i;
char otime[200];
float temp;
int hum;
char dir[10];
float speed;
int fcastTempHi;
int fcastTempLo;
char wkday1[40];
char wkday2[20];
char wkday3[20];
char wkday4[20];
int period1 = 0; // Keep track of how many period: 1's we've seen
int value = 0; // Temp variable to store value
bool haswkday = false; // Bool for if we've gotten the value or not
while(fgets(line, 1000, f) != NULL)
{
sscanf(line, "\t\t\"observation_time\":\"%[^\"]\",", otime);
sscanf(line, "\t\t\"temp_f\":%f\",", &temp);
sscanf(line, "\t\t\"relative_humidity\":\"%d\",", &hum);
sscanf(line, "\t\t\"wind_dir\":\"%[^\"]\",", dir);
sscanf(line, "\t\t\"wind_mph\":%f\",", &speed);
// If period is scanned successfully and its value is 1
if (sscanf(line, "\t\t\"period\":%d,", &value) != 0 && value == 1)
{
period1++; // Increase how many times we've seen it
}
// If we've seen exactly 2 period: 1's, then also check for weekday
if (period1 == 2 && sscanf(line, "\t\t\"weekday\":\"%[^\"]\"", &wkday1) > 0)
{
haswkday = true; // Weekday value already stored, say that we've gotten it
}
}
printf("Current Conditions\n");
printf("Observation time: %s\n", otime);
printf("Temperature: %f F\n", temp);
printf("Humidity: %d%%\n", hum);
printf("Wind: %s %f mph\n\n", dir, speed);
printf("Forecast\n");
// If we got the value, then print it
if (haswkday)
{
printf("%s:\n", wkday1);
}
fclose(f);
}
关于C编程——sscanf读取相似行，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30270764/
24
4
0
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