//C++ string字串替換
//replace()函式的使用
#include <iostream>
#include <string>
using namespace std;

int main()
{
    string var("abcdefghijklmnopqrst");
    const string dest("1234");
    string dest2("567891234");
    var.replace(3,3,dest);
    cout<<"1: "<<var<<endl;
    var="abcdefghijklmnopqrst";
    var.replace(3,1,dest.c_str(),1,3);
    cout<<"2: "<<var<<endl;
    var="abcdefghijklmnopqrst";
    var.replace(3,1,5,'X');
    cout<<"3: "<<var<<endl;
    string::iterator itA,itB;
    string::iterator itC,itD;
    itA=var.begin();
    itB=var.end();
    var="abcdefghijklmnopqrst";
    var.replace(itA,itB,dest);
    cout<<"4: "<<var<<endl;
    itA=var.begin();
    itB=var.end();
    itC=dest2.begin()+1;
    itD=dest2.end();
    var="abcdefghijklmnopqrst";
    var.replace(itA,itB,itC,itD);
    cout<<"5: "<<var<<endl;
    var="abcdefghijklmnopqrst";
    //這種方式會限定字串替換的最大長度
    var.replace(3,1,dest.c_str(),4);
    cout<<"6: "<<var<<endl;
    return 0;
}