题解 | 计算一年中的第几天(C语言)

#include <stdio.h>

int main() {
    int y,m,d;
    while(scanf("%d %d %d",&y,&m,&d) != EOF)
    {
        switch(m-1)
        {
            case 11: d+=30;
            case 10: d+= 31;
            case 9: d+=30;
            case 8: d+=31;
            case 7: d+=31;
            case 6: d+=30;
            case 5: d+=31;
            case 4: d+=30;
            case 3: d+=31;
            case 2:
            {
                if(y % 4 == 0 && y % 100 != 0 || y % 400 == 0)
                    d+=29;
                else
                    d+=28;
            }
            case 1: d+=31;
        }
        printf("%d\n",d);
    }
    return 0;
}