strchr函数的用法

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【FROM MSDN && 百科】

原型： char *strchr(const char *s,char c);

#include<string.h>

查找字符串s中首次出现字符c的位置,返回首次出现c的位置的指针，如果s中不存在c则返回NULL。

//#define  FIRST_DEMO#define  SECOND_DEMO#ifdef FIRST_DEMO#include <stdio.h>#include <conio.h>#include <string.h>#pragma warning (disable:4996)int main(void){char string[17];char *ptr;char c='T';strcpy(string,"This is a string");ptr=strchr(string,c);if (ptr){printf("The character %c is at position:%d\n",c,ptr-string);}else{printf("The character was not found\n");}getch();return 0;}#elif defined SECOND_DEMO#include <stdio.h>#include <conio.h>#include <string.h>#pragma warning (disable:4996)int main(void){    char answer[100];char *p;printf("Type something:\n");fgets(answer,sizeof answer,stdin);if ((p=strchr(answer,'\n'))!=NULL)   /*fgets不会像gets那样自动地去掉结尾的\n，所以程序中手动将\n位置处的值变为\0,代表输入的结束。*/{*p='\0';}printf("You typed \"%s\"\n",answer);getch();return 0;}#endif

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