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程序三

kalvinyZhang — Thu, 08 Sep 2011 18:11:00 GMT

题目:输入某年某月某日,判断这一天是这一年的第几天?

#include <stdio.h>

int main()
{
    int i, day, month, year, sum, leap;
    leap = 0;
    sum = 0;
    printf("Please input year, month, day\n");
    scanf("%d %d %d", &year, &month, &day);
    char s[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    for (i = 0; i < month-1; i++)
        sum += s[i];
    sum += day;
    if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {
        leap = 1;
//        printf("%d\n", year);
    }
    if (leap) {
        if (month > 2) {
            sum += 1;
            printf("The day is the %dth day\n", sum);
        }
        else
            printf("The day is the %dth day\n", sum);
    }
    else {
        if (month == 2) {
            if (day > 28)
                printf("The wrong input\n");
            else
                printf("The day is the %dth day\n", sum);
        }
        else
            printf("The day is the %dth day\n", sum);
    }
    return 0;
} //代码烦琐，很需要优化，问题是解决了，但是答案不尽人意

kalvinyZhang 2011-09-09 02:11 发表评论

程序二

kalvinyZhang — Thu, 08 Sep 2011 17:59:00 GMT

1 #include <stdio.h>
2 #include <math.h>
3
4 int main()
5 {
6     long int i, n, m;
7     for (i = 0; i < 100000; i++) {
8         n = sqrt(i+100);
9         m = sqrt(i+268);
10         if (n * n == (i+100) && m * m == (i+268))
11             printf("%ld\n", i);
12     }
13     return 0;
14 }

题目:一个整数,它加上 100 后是一个完全平方数,再加上 168 又是一个完全平方数,

请问该数是多少?

kalvinyZhang 2011-09-09 01:59 发表评论

程序一

kalvinyZhang — Thu, 08 Sep 2011 17:55:00 GMT

1 #include <stdio.h>
2
3 int main()
4 {
5     int i, j, k;
6     for (i = 0; i < 5; i++)
7         for (j = 0; j < 5; j++)
8             for (k = 0; k < 5; k++)
9                 if (i != j && i != k && j != k)
10                     printf("%d%d%d\n", i, j, k);
11     return 0;
12 }
题目：有1、2、3、4个数字，能组成多少个互不相同且无重复数字的三位数？都是多少

kalvinyZhang 2011-09-09 01:55 发表评论