C++搜索字符串

Question

我想创建将通过句子的程序，如果它找到一个字符或一个字，它会显示它。

想象一下，只要找到第一个字符/字就停下来的程序。

string test("This is sentense i would like to find ! "); //his is sentense to be searched 
    string look; // word/char that i want to search 

    cin >> look; 

    for (i = 0; i < test.size(); i++) //i<string size 
    { 
     unsigned searcher = test.find((look)); 
     if (searcher != string::npos) { 
      cout << "found at : " << searcher; 
     } 
    } 

Answer 1

你不需要循环。只要做到：

std::cin >> look; 
std::string::size_type pos = test.find(look); 
while (pos != std::string::npos) 
{ 
    // Found! 
    std::cout << "found at : " << pos << std::endl; 
    pos = test.find(look, pos + 1); 
} 

这里是表示输入字符串"is"结果的live example。