求a.replace()具体用法？

2009-08-19 10:46:17 408 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

菜鸟初学c++，对下面代码里面的a.replace()用法不慎明了，还望大侠赐教



//=====================================

// f0305.cpp

//=====================================

#include<iostream>

#include<algorithm>

using namespace std;

//-------------------------------------

int main(){

  string a, s1 = "Hello ";

  string s2 = "123";

  a = s1;                                              // copy

  cout<<(a==s1 ? "" : " not")<<"equal\n";              // compare

  cout<<(a+=s2)<<endl;                                 // concatenate

  reverse(a.begin(), a.end());                         // reverse

  cout<<a<<endl;

  cout<<a.replace(0,9,9,'c')<<endl;                    // set  cout<<(s1.find("ell")!= -1 ? "" : "not ")<<"found\n";// find string

  cout<<(s1.find('c')!= -1 ? "": "not ")<<"found\n";   // find char

}//====================================