strchr

转自：百度百科：http://baike.baidu.com/view/671247.htm

目录

简介

例子

编辑本段简介

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

const char *strchr(const char* _Str,int _Val)

char *strchr(char* _Str,int _Ch)

头文件：#include <string.h>

功能：查找字符串s中首次出现字符c的位置

说明： 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​。

返回值：Returns the address of the first occurrence of the character in the string if successful, or NULL otherwise

编辑本段例子

举例1：（在 Visual C++ 6.0中运行通过）

#include <string.h>

#include <stdio.h>

int main(void)

{

char string[17];

char *ptr, c = 'r';

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");

return 0;

}

运行结果：The character r is at position: 12Press any key to continue

举例2：

// strchr.c

#include <stdio.h>

#include <string.h>

int main()

{

char temp[32];

memset(temp,0,sizeof(temp));

strcpy(temp,"Golden Global View");

char *s = temp;

char *p,c='v';

p=strchr(s,c);

if(p)

printf("%s",p);

else

printf("Not Found!");

return 0;

}

运行结果:Not Found!Press any key to continue

举例3：

#include <stdio.h>

#include <string.h>

void main()

{

char answer[100],*p;

printf("Type something:\n");

fgets(answer,sizeof answer,stdin);

if((p = strchr(answer,'\n')) != NULL)

*p = '\0';

printf("You typed \"%s\"\n",answer);

}

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。