大数相加

大数想加的代码及用法：

#include<iostream>#include<string>using namespace std;int n=0;string jia(string a,string b,int as,int bs){    char c;    int i,j;    for(i=as-1,j=bs-1;j>=0;i--,j--)    {        c=(a[i]+b[j]-96+n)%10+48;        if(a[i]+b[j]+n-96>9)            n=1;        else            n=0;        a[i]=c;    }    for(;i>=0;i--)    {        c=(a[i]-48+n)%10+48;        if(a[i]+n-48>9)            n=1;        else            n=0;        a[i]=c;    }    return a;}int main (){    int as,bs,sd,sc,q,j,i;    string a,b;    cin>>a>>b;    as=a.size(),bs=b.size();    if (as>bs)        {            a=jia(a,b,as,bs);            if(n)                cout<<n;            cout<<a;        }    else        {            b=jia(b,a,bs,as);            if(n)                cout<<n;            cout<<b;        } }