大数相加

#include<stdio.h>
#include<string.h>
#include<algorithm>
using namespace std;
int main()
{
    char a[100],b[100];
    int s[100];
    while(~scanf("%s%s",a,b))
    {
        int lena = strlen(a);
        int lenb = strlen(b);
        reverse(a,a + lena);
        reverse(b,b + lenb);
        int maxn = max(lena,lenb);
        for(int i = lena; i < maxn; i++)
            a[i] = '0';
        for(int i = lenb; i < maxn; i++)
            b[i] = '0';
        int c =  0;
        for(int i = 0; i < maxn; i++)
        {
            int sum = a[i] + b[i] + c - 48*2;
            s[i] = sum%10;
            c = sum/10;
        }
        if(c)
            s[maxn++] = c;
        for(int i = maxn - 1; i >= 0; i--)
            printf("%d",s[i]);
        printf("n");
        memset(a,sizeof(a));
        memset(b,sizeof(b));
    }
    return 0;
}