c++ primer 练习 1.13

1.13

#include<iostream>
int main()
{
    std::cout << "Enter two numbers: " << std::endl;
    int v1 = 0, v2 = 0;
    std::cin >> v1 >> v2;
    for(;v1 <= v2; ++v1) {
        std::cout << v1 << std::endl;
    }
    return 0;
}