#include <stdio.h>
int main(void)
{
    char f[81];
    int a=0;
    char ch;
   
    puts("input the array");
    gets(f);
    puts("put a  char");
    ch=getchar();
   
    while(f[a]!='\0')
    {
        if(f[a]==ch)     
        printf("the first location is %d\n",a);
        a++;
    }
    printf("there is no %s in the array\n",ch);
    return 0;
}

谢谢各位。。。