编辑器
#include <iostream> using namespace std; int main() { int peopleInRoom = 0; cout << "People in room: " << peopleInRoom << "\n"; // 3 people enter peopleInRoom++; cout << "One person entered. People in room: " << peopleInRoom << "\n"; peopleInRoom++; cout << "One person entered. People in room: " << peopleInRoom << "\n"; peopleInRoom++; cout << "One person entered. People in room: " << peopleInRoom << "\n"; // 1 person leaves peopleInRoom--; cout << "One person left. People in room: " << peopleInRoom << "\n"; return 0; }
People in room: 0
One person entered. People in room: 1
One person entered. People in room: 2
One person entered. People in room: 3
One person left. People in room: 2
编辑器