利用char *strchr(const char *str, int c) 函数返回的指针,判断字符c所在的位置
找到第一个位置之后,从该位置的下一个字符起找。
#include <stdio.h>
#include <string.h>
int main()
{
char str[] = "this is a sample string";
char *pch;
printf("looking for 's' character in \"%s\"\n ",str);
pch = strchr(str,'s');
printf("str address = %p\n",str);
printf("pch address = %p\n",pch);
while(pch != NULL ){