C++ while/for循环的简单应用 1到100相加

1.while循环：
#include <iostream>
using namespace std;
int main() {
    
    int b = 1;
    int sum = 0 ;
    while (b<101)
    {
        sum +=  b;
        b++;
    }
    cout << "总数为：" << sum << endl;
    system("pause");
    return 0;
}

2.for循环
#include <iostream>
using namespace std;
int main() {
    int i, sum = 0;
    for (i = 1; i < 101; i++) {
        sum += i;
    }
    cout << "总数为：" << sum << endl;
    system("pause");
    return 0;
}