hdu 1002 A + B Problem II

A + B Problem II

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 371689    Accepted Submission(s): 72437

Problem Description

I have a very simple problem for you. Given two integers A and B, your job is to calculate the Sum of A + B.

 

 

Input

The first line of the input contains an integer T(1<=T<=20) which means the number of test cases. Then T lines follow, each line consists of two positive integers, A and B. Notice that the integers are very large, that means you should not process them by using 32-bit integer. You may assume the length of each integer will not exceed 1000.

 

 

Output

For each test case, you should output two lines. The first line is "Case #:", # means the number of the test case. The second line is the an equation "A + B = Sum", Sum means the result of A + B. Note there are some spaces int the equation. Output a blank line between two test cases.

 

 

Sample Input

2 1 2 112233445566778899 998877665544332211

 

 

Sample Output

Case 1: 1 + 2 = 3 Case 2: 112233445566778899 + 998877665544332211 = 1111111111111111110

 

 

数字太大了   只能使用字符串来保存数字 

模拟我们小学学习加法的方法

从后面一位一位的加    大于9就进位

#include<stdio.h>
#include<string.h>
int main()
{
    char op1[1002],op2[1002];
    int c,i,j,n,m,s1[1002],s2[1002],len1,len2,count;
    count=1;
    scanf("%d",&n);
    m=n;
    while(m--)
    {
        memset(s1,0,1002*sizeof(int));
        memset(s2,0,1002*sizeof(int));
        scanf("%s",op1);
        scanf("%s",op2);
        len1=strlen(op1);
        len2=strlen(op2);
        c=0;
        for(i=len1-1;i>=0;i--)
            s1[c++]=op1[i]-'0';
        c=0;
        for(i=len2-1;i>=0;i--)
            s2[c++]=op2[i]-'0';
        for(i=0;i<1002;i++)
        {
            s1[i]+=s2[i];
            if(s1[i]>=10)
            {
                s1[i]-=10;
                s1[i+1]++;
            }
        }
        printf("Case %d:\n",count++);
        printf("%s + %s = ",op1,op2);
        for(i=1001;i>=0;i--)
            if(s1[i])
                break;
        for(j=i;j>=0;j--)
            printf("%d",s1[j]);
        printf("\n");
        if(count!=n+1)
            printf("\n");
    }
    return 0;
}