hdu 1002

高精度。。。。

#include <stdio.h>
#include <string.h> 
int sum[1000];
void add (char a[] ,char b[])
{
     int i = strlen(a) - 1 ,j = strlen (b) - 1;
     int x = 0 ,s ,k = 0;
     while (i >= 0 && j >= 0)
     {
           s = a[i--] + b[j--] - 96 + x ;
           sum[k++] = s % 10 ; 
           x = s / 10 ;
     }
     if (j == -1)
     while (i >= 0)
     {
          s = a[i--] - 48 + x ;
          sum[k++] = s % 10 ;
          x = s / 10 ;
     }
     if (i == -1)
     while (j >= 0)
     {
          s = b[j--] - 48 + x ;
          sum[k++] = s % 10 ;
          x = s / 10 ;
     }
     if (x)
     sum[k] = x ;
     else 
     k = k - 1 ;      
     for (i = k ;i >= 0 ;i--)
     printf ("%d",sum[i]);
}
int main ()
{
     int t ,i;
     char a[1000] ,b[1000];
     scanf ("%d",&t);
     for (i = 1 ;i <= t ;i++)
     {
          memset(a , '0' ,sizeof (a));
          memset(b , '0' ,sizeof (b));
          scanf ("%s%s",a ,b);
          printf ("Case %d:\n%s + %s = ",i ,a ,b);
          add (a ,b);
          printf ("\n");
          if(i != t)printf("\n");
     }
     return 0;
}