C++ 小程序

#include <cstdio>
#include <iostream>
using namespace std;
int main(){
freopen("in.txt", "r", stdin);
freopen("out.txt", "w", stdout);

string str;
//while(getline(cin, str)){
while(cin >> str){ //这个遇见空格会断句
cout << "* " + str << endl; //写Markdown时将每行前面加上一个星号

int pos = str.find('+'); //写Markdown时将每行的加号前后加上空格
cout << str.substr(0, pos) << " + " << str.substr(pos + 1, str.size()) << endl;

}
return 0;
}