2024-10-22 17:46:23
“位置”就是要找的字符在s中的下标。让Strchr返回一个int值,体中建立一个循环,找到ch后就把下标返回,整个s中没有找到ch则返回-1以示区别。举例代码如下:
//#include "stdafx.h"//If the vc++6.0, with this line.
#include "stdio.h"
int Strchr(char s[],char ch){
int i;
for(i=0;s[i];i++)//在s中查找ch
if(s[i]==ch)
return i;//找到就返回它的下标i
return -1;//找不到返回-1
}
int main(void){
char str[]="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890",ch;
printf("Enter a letter or Number...\nch=");
scanf("%c%*c",&ch);
printf("The subscript of %c is %d\n",ch, Strchr(str,ch));
return 0;
}
2024-10-22 12:39:53