【C】库函数之 strchr

本文主要是介绍【C】库函数之 strchr，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

目录

1. Locate first occurrence of character in string

2. 源代码

3. 输出结果

---

1. Locate first occurrence of character in string

#include <string.h>
char * strchr ( const char * str, int character );

Returns a pointer to the first occurrence of character in the C string str.

The terminating null-character is considered part of the C string. Therefore, it can also be located in order to retrieve a pointer to the end of a string.

上述内容是 cplusplus 对 strchr 函数的介绍，

可以看出 strchr 函数返回要查找字符第一次出现的位置，如果没有查找成功，则返回空指针。

2. 源代码

#include <stdio.h>
#include <assert.h>#define SRC_STR "hello"
#define FIND_CHAR 'l'char *Strchr(const char *src, int c) {assert(NULL != src);while (('\0' != *src) && (*src != (char)c))++src;if ((char)c == *src)return (char *)src;return NULL;
}  void test() {char *ret = Strchr(SRC_STR, FIND_CHAR);if (NULL != ret)printf("call Strchr, find [%c/%s] in src: %s\n", FIND_CHAR, ret, SRC_STR);elseprintf("call Strchr, not find [%c/%s] in src: %s\n", FIND_CHAR, ret, SRC_STR);
}  int main(void) {  test();return 0;
}

3. 输出结果

call Strchr, find [l/llo] in src: hello

这篇关于【C】库函数之 strchr的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！

---