标签:hdu
Description
Input
Output
Sample Input
2 1 2 112233445566778899 998877665544332211
Sample Output
Case 1: 1 + 2 = 3 Case 2: 112233445566778899 + 998877665544332211 = 1111111111111111110
题目大意:
大整数相加。
解题思路:
先把短的补齐,从最后一位开始计算,不进为就直接放进容器,进为把取余的放进容器,然后前一位加一。
代码:
#include<iostream> #include<string> #include<cstdio> #include<vector> using namespace std; int t; string str1,str2; vector <char> v; void solve(){ string temp; int a,l2; if(str1.length()<str2.length()){ temp=str1;str1=str2;str2=temp; l2=str2.length(); } for(int i=0;i<str1.length()-l2;i++){ str2.insert(0,1,'0'); } for(int i=0;i<str1.length();i++){ a=str1[str1.length()-i-1]+str2[str2.length()-i-1]-2*'0'; if(a>=10){ v.push_back(a%10+'0'); if(str1.length()-i-1==0){ v.push_back('1');break; } str1[str1.length()-i-2]=(char)(str1[str1.length()-i-2]+1); } else v.push_back((char)(a+'0')); } vector<char>::iterator it=v.end(); it--; while(it!=v.begin()){ if(*it=='0') v.erase(it); else break; it--; } for(int i=v.size()-1;i>=0;i--){ cout<<v[i]; } cout<<endl; } int main(){ int casen=0; scanf("%d",&t); while(t-->0){ cin>>str1>>str2; printf("Case %d:\n%s + %s = ",++casen,str1.c_str(),str2.c_str()); v.clear(); solve(); if(t!=0) cout<<endl; } return 0; }
HDU 1002 A + B Problem II(大整数相加),布布扣,bubuko.com
HDU 1002 A + B Problem II(大整数相加)
标签:hdu
原文地址:http://blog.csdn.net/hush_lei/article/details/38457009