1. int main (int argc, char *argv[])
   
2. {
   
3.     if (argc != 4) {
   
4.         std::cerr << "wrong" << std::endl;
   
5.         return -1;
   
6.     }
   
7.     std::string str1 (argv[1]), str2 (argv[2]), str3 (argv[3]);
   
8.     std::string::iterator match_begin
   
9.         = std::search (str1.begin(), str1.end(), str2.begin (), str2.end ());
   
10.     if (match_begin == str1.end ()) {
    
11.         std::cerr << "wrong" << std::endl;
    
12.         return -1;
    
13.     }
    
14.     std::string::iterator match_end = match_begin + str2.size ();
    
15.     std::string result (str1.begin (), match_begin);
    
16.     result.append (str3.begin(), str3.end ());
    
17.     result.append (match_end, str1.end ());
    
18.     std::cout << result << std::endl;
    
19.     return 0;
    
20. }

复制代码

这样写编译报错，为什么。

1. int main (int argc, char *argv[])
   
2. {
   
3.     if (argc != 4) {
   
4.         std::cerr << "wrong" << std::endl;
   
5.         return -1;
   
6.     }
   
7.     std::string str1 (argv[1]), str2 (argv[2]), str3 (argv[3]);
   
8.     std::string::iterator match_begin
   
9.         = std::search (str1.begin(), str1.end(), str2.begin (), str2.end ());
   
10.     if (match_begin == str1.end ()) {
    
11.         std::cerr << "wrong" << std::endl;
    
12.         return -1;
    
13.     }
    
14.     std::string::iterator match_end = match_begin + str2.size ();
    
15.     std::string result (str1.begin (), match_begin);
    
16.     result.append (str3.begin(), str3.end ());
    
17.     result.append (match_end, str1.end ());
    
18.     std::cout << result << std::endl;
    
19.     return 0;
    
20. }

复制代码

这样写编译报错，为什么。