例2-1
“Hello Welcome to C++”
代码部分:
#include<iostream> using namespace std; int main() { cout << "hello!" << endl; cout << "Welcome to C++!" << endl; return 0; }
例2-2
输入一个年份,判断是否闰年
分析部分:
闰年可以被4整除不能被100整除,或能被400整除。
代码部分:
#include<iostream> using namespace std; int main() { int year; bool isLeapYear; cout << "Enter the year:"; cin >> year; isLeapYear = ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)); if (isLeapYear) cout << year << " is a Leap year" << endl; else cout << year << " is not a leap year" << endl; return 0; }
例2-3
比较两个数的大小
分析:两个数比较有三种可能大于,小于,等于。
代码部分:
#include<iostream> using namespace std; int main() { int x, y; cout << "Enter x and y:"; cin >> x >> y; if (x = y) { cout << "x=y" << endl; } else { if (x > y) cout << "x>y" << endl; else cout << "x<y" << endl; } return 0; }