std:: strstr
      From cppreference.net
     
     
     | 
           定义于头文件
            
            
             <cstring>
            
            | ||
| 
           
            
             const
            
            
             char
            
            
             *
            
            strstr
            
             (
            
            
             const
            
            
             char
            
            
             *
            
            haystack,
            
             const
            
            
             char
            
            
             *
            
            needle
            
             )
            
            
             ;
            
           
           | ||
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             char
            
            
             *
            
            strstr
            
             (
            
            
             char
            
            
             *
            
            haystack,
            
             const
            
            
             char
            
            
             *
            
            needle
            
             )
            
            
             ;
            
           
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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
           
          
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