c - 简单的段错误，我似乎找不到问题所在

Question

这个问题已经有答案了:

SegFault after scanf? (4 个回答)

已关闭 7 年前。

可能有一个简单的解决方案，但作为菜鸟，我似乎找不到问题。当我第一次运行该程序时，一切都很好，但在 scan("%f",hrs) 之后我收到“段错误(核心已转储)”。任何帮助将不胜感激，谢谢。如果您也想查看完整代码 you can find it here.

这是我收到的警告:格式“%f”需要“float *”类型的参数，但参数 2 的类型为“double”

float grossModule(float *hours, float payrate, float *overtimeHours);
void CalculateTaxes(float *gross, float *defr, float *fedtax, float *statetax, float *ssitax);
float calcFedtax(float gross, float defr);
float calcStatetax(float fedtax);
float calcSSItax(float gross, float defr);
float netModule(float *gross, float *ft, float *st, float *ssit);

int main(void)
{
    float dfr,ft,st,ssit,gross,hrs,pay,net,ovrtHrs;
    int counter = 0;
    float netTotal, payTotal, hoursTotal, overtimeTotal, grossTotal, fedTotal, stateTotal, ssiTotal, dfrTotal;
    float grossAvg, netAvg, payAvg, hoursAvg, overtimeAvg, fedAvg, stateAvg, ssiAvg, dfrAvg;
    char fName[11], lName[21], ask[4];
    FILE * myreport;
    myreport = fopen("reports.txt","wt");

fprintf(myreport, header1);
fprintf(myreport, header2);
fprintf(myreport, header3);

netTotal = payTotal = hoursTotal = overtimeTotal = grossTotal = fedTotal = stateTotal = ssiTotal = dfrTotal = 0;
dfr = ft = st = ssit = gross = hrs = pay = net = ovrtHrs = 0;

do
{
    counter++;
    printf("Please enter your FIRST name: ");
    scanf("%s",fName);
    printf("Please enter your LAST name: ");
    scanf("%s",lName);
    printf("Enter your payrate: \n");
    scanf("%f",pay);
    printf("Please enter your total hours: ");
    scanf("%f",hrs);
    printf("Please enter the amount of deferred earnings: ");
    scanf("%f",dfr);

Answer 1

改变

 scanf("%f",pay);
 printf("Please enter your total hours: ");
 scanf("%f",hrs);
 printf("Please enter the amount of deferred earnings: ");
 scanf("%f",dfr);Change 

至

 scanf("%f", &pay);
 printf("Please enter your total hours: ");
 scanf("%f", &hrs);
 printf("Please enter the amount of deferred earnings: ");
 scanf("%f", &dfr);

scanf 需要变量的地址，而不是它的内容。

顺便说一句，编译器应该为此发出警告。