HDU1002

#include"iostream"
#include"stdio.h"
#include"stdlib.h"
#include"string.h"
using namespace std;
char c[1000];
void sum(char a[],char b[]){
    int al=strlen(a)-1;
    int bl=strlen(b)-1;
    int cl=0;
    while(al>=0&&bl>=0){
        c[cl]+=a[al]+b[bl]-‘0‘*2;
        c[cl+1]+=c[cl]/10;
        c[cl]=c[cl]%10;
        al--;bl--;cl++;
    }
    while(al>=0){
        c[cl]+=a[al]-‘0‘;
        c[cl+1]+=c[cl]/10;
        c[cl]=c[cl]%10;
        al--;cl++;
    }
    while(bl>=0){
        c[cl]+=b[bl]-‘0‘;
        c[cl+1]+=c[cl]/10;
        c[cl]=c[cl]%10;
        bl--;cl++;
    }
    if(c[cl]==0)cl--;
    for(int i=0;i<=cl;i++)printf("%c",c[cl-i]+‘0‘);
    printf("\n");
}
int main(){
    char a[1000],b[1000];
    int ti;
    scanf("%d",&ti);
    for(int i=1;i<=ti;i++){
        cin>>a>>b;
        memset(c,0,1000);
        printf("Case %d:\n%s + %s = ",i,a,b);
        sum(a,b);
        if(i!=ti)printf("\n");
    }
}