描述
对于给定的算术表达式，按规则输出计算结果，仅包含加法和大小判断。
输入
一行字符串，为加号、大于、小于( + < > ) 连接的两个不限大小的非负整数。
输出
当符号为 + 时, 计算两个数相加的和, 并以字符串格式返回； 当符号为 < 时, 如果左数小于右数, 返回大写字母字符 Y, 否则返回大写字母字符 N； 当符号为 > 时, 如果左数大于右数, 返回大写字母字符 Y, 否则返回大写字母字符 N。
!!!请同学们尽量使用算法来解决这个问题
输入样例
972919822976663297>74058 875098336507333719633571722631534917759993913379786689>53558270653237768027942884431075534537929401567824882097903948774409200 7625022925148127196027859399571498914361+790786706794530
输出样例
Y N 7625022925148127196027860190358205708891
AC代码：
#include <bits/stdc++.h>
#include<vector>
#include<stack>
#include<sstream>
using namespace std;
string func1(string s1,string s2) //大于号
{
if(s1.length()>s2.length())
{
return "Y";
}
else if(s1.length()<s2.length())
{
return "N";
}
else if(s1 == s2)
{
return "N";
}
else
{
int i = 0;
while(i!=s1.length())
{
if((s1[i]-'0') > (s2[i]-'0'))
{
return "Y";
}
else if((s1[i]-'0') < (s2[i]-'0'))
{
return "N";
}
i++;
}
}
}
string func2(string s1,string s2) //小于号
{
if(s1.length()>s2.length())
{
return "N";
}
else if(s1.length()<s2.length())
{
return "Y";
}
else if(s1 == s2)
{
return "N";
}
else
{
int i = 0;
while(i!=s1.length())
{
if((s1[i]-'0') > (s2[i]-'0'))
{
return "N";
}
else if((s1[i]-'0') < (s2[i]-'0'))
{
return "Y";
}
i++;
}
}
}
string func3(string s1,string s2) //加号
{
char temp;
string result ="";
bool flag = false;//判断是否有进位
//已经默认s1>=s2
while(s1.length()!=s2.length()){
s2 = "0" + s2;
}
int i = s1.length()-1;
while(i>=0)
{
stringstream ss;
ss.clear();
string temp = "";
if(flag == false)
{
if((s1[i]-'0') + (s2[i]-'0') > 9)
{
flag = true;
ss.clear();
ss<<(((s1[i]-'0') + (s2[i]-'0'))-10);
ss>>temp;
result =temp + result;
}
else
{
flag = false;
ss.clear();
ss<<((s1[i]-'0') + (s2[i]-'0'));
ss>>temp;
result = temp + result;
}
}
else
{
if((s1[i]-'0') + (s2[i]-'0')+1 > 9)
{
flag = true;
ss.clear();
ss<<(((s1[i]-'0') + (s2[i]-'0')+1)-10);
ss>>temp;
result = temp+ result;
}
else
{
flag = false;
ss.clear();
ss<<((s1[i]-'0') + (s2[i]-'0')+1);
ss>>temp;
result = temp + result;
}
}
i--;
}
if(flag == true)
{
result = "1" + result;
}
return result;
}
int main()
{
string s="";
while(cin>>s)
{
int mode = 0;
string s1 = "";
string s2 = "";
for(int i = 0; i<s.length(); i++)
{
if(s[i] == '>' || s[i] =='<' ||s[i] =='+')
{
s1 = s.substr(0,i);
s2 = s.substr(i+1,s.length()-i-1);
if(s[i] == '>')
{
mode = 1;
}
else if(s[i] == '<')
{
mode = 2;
}
else if(s[i] == '+')
{
mode = 3;
}
break;
}
}
if(mode == 1)
{
cout<<func1(s1,s2)<<endl;
}
else if(mode == 2)
{
cout<<func2(s1,s2)<<endl;
}
else if(mode == 3)
{
if(func1(s1,s2) == "Y")
{
cout<<func3(s1,s2)<<endl;
}
else
{
cout<<func3(s2,s1)<<endl;
}
}
}
}