程序代码：

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;
}