大数相加

   #include <stdio.h> #include <string.h>  int main() { //freopen("a.txt","r",stdin); //freopen("b.txt","w",stdout); char a[1000],b[1000]; int result[1000]; int i,t,alen,blen; scanf("%d",&t); for (i=1;i<=t;i++) {    int res=0,total,j=-1,k;    if (i>1) putchar(10);    printf("Case %d:\n",i);    scanf("%s%s",a,b);    alen=strlen(a)-1;    blen=strlen(b)-1;    while (alen>=0||blen>=0)    {     int an,bn;     if (alen>=0) an=a[alen]-48;     else an=0;     if (blen>=0) bn=b[blen]-48;     else bn=0;     total=an+bn+res;     res=total/10;     result[++j]=total%10;     alen--;     blen--;    }    printf("%s + %s = ",a,b);    if (res) printf("%d",res);    //while (result[j]==0) j--;    for (k=j;k>=0;k--)     printf("%d",result[k]);    putchar(10); } return 0; }