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; } }
