for循环

#include <iostream>

using namespace std;

int main() {
//显示1,2,3...10
for (int i = 1; i <= 10; i++)
cout << i << endl;

//显示10,9,8...1
for (int i = 10; i>= 1; i--)
	cout << i << endl;

//显示1,3,5...9
for (int j = 1; j <= 10; j += 2)
	cout << j << endl;

//显示ABC...Z   
for (char c = 'A'; c < 'Z'; c++)
	cout << c << endl;

//显示0,0.1,0.2...1.0
for (float a = 0; a <= 1.1; a+=0.1)
	cout << a << endl;

//计算s=1+2+3...+100
int s = 0;
for (int n = 1; n <= 100; n++)
	s = s + n;
	cout << "s="<<s << endl;
return 0;

}