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c - 不断得到预期 'const char *'

转载 作者:太空宇宙 更新时间:2023-11-04 08:20:19 25 4
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我是大学一年级的学生,所以我对 c 了解不多。我们有一个关于使用数组制作飞机座位的作业,我的代码一直在说预期的“const char *”但参数是“char”类型并且传递“strcmp”的参数 1 使整数指针没有特别在第 92:2 行进行强制转换94:2 96:2.... 到 107:2,然后 155:2 到 178:2。

#include <stdio.h>
#include <string.h>

char first_class();
void business_class();

int main()

{

int row,class = 0;

char X;


char seating[13][6] ={
{X, X, '*', '*', '*', '*'},{'*','*',X,X,'*','*'},{X,X,X,'*','*',X},{'*','*','*',X,X,'*'},{X,X,X,X,X,X},{'*','*',X,X,'*','*'},{'*',X,'*','*',X,X},{'*','*','*','*','*','*'},{X,'*','*','*',X,'*'},{X,X,X,'*','*','*'},{X,X,X,X,X,X},{'*','*','*','*','*','*'},{'*',X,X,X,'*','*'} };

int i,j;
int a;

char c;
char seat;





printf("*********************************************************\n");

printf("**** Thank you for choosing Ricardio's Airline. ****\n");

printf("** Best seats available for your flight, guaranteed, **\n");

printf("**** Refund is not available ****\n");

printf("*********************************************************\n");



printf("We have the best seats in da haus yo!\n");

printf("Please select a Class\n");

printf("1 = First Class, 2 = Business Class, 3 = Economy Class\n:");

scanf("%d", &class);


for(c='A'; c<='G'; ++c)

printf("\t %c", c);
printf("\n");
for(i = 0;i < 14; i++)

{

printf("Row %d", i);

for(j = 0; j < 7; j++)
{
printf("\t seating[i][j]");

if (j % 6 == 0)

printf("\n");

}
}

if (class == 1)

first_class();



else if (class == 2)

business_class();



else if (class == 3)

printf ("economy_class()");



else

printf("Invalid Class");
if(strcmp(seat, "1C") == 0)
seating[0][2] = X;
if(strcmp(seat, "1D") == 0)
seating[0][3] = X;
if(strcmp(seat, "1E") == 0)
seating[0][4] = X;
if(strcmp(seat, "1F") == 0)
seating[0][5] = X;

if(strcmp(seat, "2A") == 0)
seating[1][0] = X;
if(strcmp(seat, "2B") == 0)
seating[1][1] = X;
if(strcmp(seat, "2E") == 0)
seating[1][4] = X;
if(strcmp(seat, "2F") == 0)
seating[1][5] = X;

for(c='A'; c<='G'; ++c)

printf("\t %c", c);
printf("\n");
for(i = 0;i < 14; i++)

{

printf("Row %d", i);

for(j = a; j < 7; j++){

printf("\t seating[i][j]");

if (j % 6 == 0)

printf("\n");
}
}

return 0;
}


char first_class()
{

int row = 0;
char column;
char seat;

printf ("*******************************************************\n");

printf ("* First Class *\n");

printf ("*******************************************************\n");



printf ("Rows 1 and 2 are reserved for First Class seating.\n");

printf ("Which seat would you like?\n");

scanf("%s", seat);

if(strcmp(seat, "1A") == 0)
printf("The seat you have chosen is already taken");
if(strcmp(seat, "1B") == 0)
printf("The seat you have chosen is already taken");
if(strcmp(seat, "1C") == 0)
printf("You have chosen seat %d %c", row,column);
if(strcmp(seat, "1D") == 0)
printf("You have chosen seat %d %c", row,column);
if(strcmp(seat, "1E") == 0)
printf("You have chosen seat %d %c", row,column);
if(strcmp(seat, "1F") == 0)
printf("You have chosen seat %d %c", row,column);

if(strcmp(seat, "2A") == 0)
printf("You have chosen seat %d %c", row,column);
if(strcmp(seat, "2B") == 0)
printf("You have chosen seat %d %c", row,column);
if(strcmp(seat, "2C") == 0)
printf("The seat you have chosen is already taken");
if(strcmp(seat, "2D") == 0)
printf("The seat you have chosen is already taken");
if(strcmp(seat, "2E") == 0)
printf("You have chosen seat %d %c", row,column);
if(strcmp(seat, "2F") == 0)
printf("You have chosen seat %d %c", row,column);

else

printf("Invalid Row or That Row Is For The Other Classes");
return seat;
}
void business_class()

{
int column;
int row = 0;

printf ("*******************************************************\n");

printf ("* Business Class *\n");

printf ("*******************************************************\n");



printf ("Rows 3,4,5,7 and 8 are reserved for First Class seating.\n");

printf ("Which row would you like?\n");

scanf("%d", row);

if(row = 3)

printf("Please select your coloumn\n");

scanf("%s",column);

if(column = 'A')
printf("Hi");

if(row = 4)

printf("Please select your coloumn\n");

else

printf("Invalid Row or That Row Is For The Other Classes");
}

最佳答案

您的脚本有一些问题。首先,您必须更改第 139 行

char seat; 

如下:

char *seat; 

因为你像处理字符串一样处理变量 seat ,所以 char 表示一个字符。其他观察结果是您需要使用 scanf 传递变量的方向,因此,您必须替换以下行:

scanf("%s",column);
scanf("%d",row);

通过

scanf("%d",&column);
scanf("%d",&row);

请注意,第二次您必须将变量的类型更改为“%d”(整数)。另一方面,您有一个函数 first_class 返回一个 char,但是,您想要返回一个字符串的变量 seat,因此,您必须将函数定义替换为

char* first_class()

此外,要比较变量,您必须使用运算符 ==,请参阅函数 business_class。你的最终代码必须是这样的:

#include <stdio.h>
#include <string.h>

char *first_class();
void business_class();

int main()
{

int row,class = 0;
char X;
char seating[13][6] ={
{X, X, '*', '*', '*', '*'},{'*','*',X,X,'*','*'},{X,X,X,'*','*',X},{'*','*','*',X,X,'*'},{X,X,X,X,X,X},{'*','*',X,X,'*','*'},{'*',X,'*','*',X,X},{'*','*','*','*','*','*'},{X,'*','*','*',X,'*'},{X,X,X,'*','*','*'},{X,X,X,X,X,X},{'*','*','*','*','*','*'},{'*',X,X,X,'*','*'} };

int i,j;
int a;

char c;
char *seat;
seat = (char *) malloc(15);




printf("*********************************************************\n");

printf("**** Thank you for choosing Ricardio's Airline. ****\n");

printf("** Best seats available for your flight, guaranteed, **\n");

printf("**** Refund is not available ****\n");

printf("*********************************************************\n");



printf("We have the best seats in da haus yo!\n");

printf("Please select a Class\n");

printf("1 = First Class, 2 = Business Class, 3 = Economy Class\n:");

scanf("%d", &class);


for(c='A'; c<='G'; ++c)
printf("\t %c", c);
printf("\n");

for(i = 0;i < 14; i++)
{
printf("Row %d", i);
for(j = 0; j < 7; j++)
{
printf("\t seating[i][j]");
if (j % 6 == 0)
printf("\n");
}
}

if (class == 1)
first_class();
else if (class == 2)
business_class();
else if (class == 3)
printf ("economy_class()");
else
printf("Invalid Class");


if(strcmp(seat, "1C") == 0)
seating[0][2] = X;
if(strcmp(seat, "1D") == 0)
seating[0][3] = X;
if(strcmp(seat, "1E") == 0)
seating[0][4] = X;
if(strcmp(seat, "1F") == 0)
seating[0][5] = X;

if(strcmp(seat, "2A") == 0)
seating[1][0] = X;
if(strcmp(seat, "2B") == 0)
seating[1][1] = X;
if(strcmp(seat, "2E") == 0)
seating[1][4] = X;
if(strcmp(seat, "2F") == 0)
seating[1][5] = X;

for(c='A'; c<='G'; ++c)
printf("\t %c", c);
printf("\n");

for(i = 0;i < 14; i++)
{
printf("Row %d", i);
for(j = a; j < 7; j++){
printf("\t seating[i][j]");
if (j % 6 == 0)
printf("\n");
}
}

return 0;
}


char* first_class()
{

int row = 0;
char column;
char *seat;

printf ("*******************************************************\n");

printf ("* First Class *\n");

printf ("*******************************************************\n");



printf ("Rows 1 and 2 are reserved for First Class seating.\n");

printf ("Which seat would you like?\n");

scanf("%s", seat);


if(strcmp(seat, "1A") == 0)
printf("The seat you have chosen is already taken");
if(strcmp(seat, "1B") == 0)
printf("The seat you have chosen is already taken");
if(strcmp(seat, "1C") == 0)
printf("You have chosen seat %d %c", row,column);
if(strcmp(seat, "1D") == 0)
printf("You have chosen seat %d %c", row,column);
if(strcmp(seat, "1E") == 0)
printf("You have chosen seat %d %c", row,column);
if(strcmp(seat, "1F") == 0)
printf("You have chosen seat %d %c", row,column);

if(strcmp(seat, "2A") == 0)
printf("You have chosen seat %d %c", row,column);
if(strcmp(seat, "2B") == 0)
printf("You have chosen seat %d %c", row,column);
if(strcmp(seat, "2C") == 0)
printf("The seat you have chosen is already taken");
if(strcmp(seat, "2D") == 0)
printf("The seat you have chosen is already taken");
if(strcmp(seat, "2E") == 0)
printf("You have chosen seat %d %c", row,column);
if(strcmp(seat, "2F") == 0)
printf("You have chosen seat %d %c", row,column);

else

printf("Invalid Row or That Row Is For The Other Classes");
return seat;
}




void business_class()
{
int column;
int row = 0;

printf ("*******************************************************\n");
printf ("* Business Class *\n");
printf ("*******************************************************\n");
printf ("Rows 3,4,5,7 and 8 are reserved for First Class seating.\n");
printf ("Which row would you like?\n");
scanf("%d", &row);

if(row == 3)
printf("Please select your coloumn\n");
scanf("%d",&column);

if(column == 'A')
printf("Hi");

if(row == 4)
printf("Please select your coloumn\n");
else
printf("Invalid Row or That Row Is For The Other Classes");
}

关于c - 不断得到预期 'const char *',我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33728589/

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