欧拉计划Problem

 C#

#include 
int main(){
    int x = 0;
    int ret = 0;
    int monday[] = {31,28,31,30,31,30,31,31,30,31,30,31};
    for(int i = 1901;i<=2000;i++){
        if((i%4==0&&i%100!=0) || i%400==0)//闰年
            monday[1] = 29;
        else
            monday[1] = 28;
        for(int j=0;j<12;j++){
            int temp = (x+1)%7;
            if((temp+1) == 7)
                ret++;
            x += monday[j];
        }
    }
    printf("%d",ret);    
}

Java

package exercise;

public class _周日计数 {

	public static void main(String[] args) {
		int week = 1,res = 0;
		int x = 0;
		int monday[] = new int[]{31,28,31,30,31,30,31,31,30,31,30,31};
		for(int i=1901;i<=2000;i++) {
			if(i%4==0&&i%100!=0||i%400==0) {
				monday[1] = 29;
			}else {
				monday[1] = 28;
			}
			for(int j=0;j<12;j++) {
				int temp = (x+1)%7;
				if((week+temp)==7) {
					res++;
				}
				x += monday[j];
			}
		}
		System.out.println(res);
	}

}

结果：171