std:: strstr
From cppreference.net
|
定义于头文件
<cstring>
|
||
|
const
char
*
strstr
(
const
char
*
haystack,
const
char
*
needle
)
;
|
||
|
char
*
strstr
(
char
*
haystack,
const
char
*
needle
)
;
|
||
在由 haystack 指向的字节串中查找字节串 needle 的首次出现。不比较终止空字符。
目录 |
参数
| haystack | - | 指向要检查的空终止字节字符串的指针 |
| needle | - | 指向要搜索的空终止字节字符串的指针 |
返回值
指向在 haystack 中找到的子串首字符的指针,如果未找到则返回空指针。若 needle 指向空字符串,则返回 haystack 。
示例
运行此代码
#include <cstring> #include <iomanip> #include <iostream> int main() { const char* str = "Try not. Do, or do not. There is no try."; const char* target = "not"; for (const char* result = str; (result = std::strstr(result, target)); ++result) std::cout << "Found " << std::quoted(target) << " starting at (" << result - str << "): " << std::quoted(result) << '\n'; }
输出:
Found "not" starting at (4): "not. Do, or do not. There is no try." Found "not" starting at (19): "not. There is no try."
参见
|
查找给定子串的首次出现
(
std::basic_string<CharT,Traits,Allocator>
的公开成员函数)
|
|
|
在宽字符串中查找另一宽字符串的首次出现
(函数) |
|
|
查找字符的首次出现
(函数) |
|
|
查找字符的最后一次出现
(函数) |
|
|
C 文档
for
strstr
|
|