C++ 代码

#include<bits/stdc++.h>
using namespace std;
string a,b;
int ans[100005],two[100005],c[100005];
int main()
{
    int i,l1,l2,f=1,l,h=0;
    memset(c,0,sizeof(c));
    memset(ans,0,sizeof(ans));
    memset(two,0,sizeof(two));
    cin>>a>>b;
    l1=a.size();
    l2=b.size();
    for(i=0;i<l1;i++)ans[l1-i-1]=a[i]-'0';
    for(i=0;i<l2;i++)two[l2-i-1]=b[i]-'0';
    for(i=0;i<l1;i++)if(ans[i]){h=1;break;} 
    for(i=0;i<l2;i++)if(two[i]){h=1;break;}
    if(h==0){
        printf("0\n");
        return 0;
    }
    l=max(l1,l2)+1;
    for(i=0;i<l;i++){
        c[i]+=(ans[i]+two[i]);
        c[i+1]=c[i]/10;
        c[i]%=10;
    }
    for(i=l;i>=0;i--){
        if(c[i])f=0;
        if(f)continue;
        printf("%d",c[i]);
    }
    printf("\n");
    return 0;
}