第 20 題 - 解答

#include <stdio.h>

int main()

{

   int start,end,start_y,start_m,start_d,end_y,end_m,end_d;

   int months[]={0,31,59,90,120,151,181,212,243,273,304,334,365};

   int days,temp; 

   printf("日期1：");

   scanf("%d",&start);

   printf("日期2：");

   scanf("%d",&end);

   if(start>end){

        temp=start;

        start=end;

        end=temp;

   }

   start_y=start/10000;

   start=start%10000;

   start_m=start/100;

   start_d=start%100;

   end_y=end/10000;

   end=end%10000;

   end_m=end/100;

   end_d=end%100;

   if(start_y==end_y){

        if(start_m==end_m){

             days=end_d-start_d; 

             printf("相差%d天\n",days);

       }else{

            days=months[end_m-1]+end_d-months[start_m-1]-start_d;

            printf("相差%d天\n",days);

       }

   }else{

        days=(365-months[start_m-1]-start_d); 

        days+=365*(end_y-start_y-1);

        days+=months[end_m-1]+end_d; 

        printf("相差%d天\n",days);

   }

   return 0;

}

#include <stdio.h>

int main()

{

   int start,end,start_y,start_m,start_d,end_y,end_m,end_d;

   int months[]={0,31,59,90,120,151,181,212,243,273,304,334,365};

   int days,temp; 

   scanf("%d",&start);

   scanf("%d",&end);

   if(start>end){

       temp=start;

       start=end;

       end=temp;

   }

   start_y=start/10000;

   start=start%10000;

   start_m=start/100;

   start_d=start%100;

   end_y=end/10000;

   end=end%10000;

   end_m=end/100;

   end_d=end%100;

   if(start_y==end_y){

       if(start_m==end_m){

           days=end_d-start_d; 

           printf("%d\n",days);

       }else{

           days=months[end_m-1]+end_d-months[start_m-1]-start_d;

           printf("%d\n",days);

       }

   }else{

       days=(365-months[start_m-1]-start_d); 

       days+=365*(end_y-start_y-1);

       days+=months[end_m-1]+end_d; 

       printf("%d\n",days);

   }

   return 0;

}