ZYM/OI-source
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

delete pics to save space

Browse Source
This commit is contained in:
happyZYM
2023-08-03 09:22:52 +08:00
commit de60cd6ed4
1334 changed files with 66221 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

70
history_source/ccf 基础篇/U6/6.5.3.cpp Normal file
View File

@ -0,0 +1,70 @@
#include<iostream>
#include<vector>
#include<string>
#include<sstream>
using namespace std;
long double str_num(string sr)
{
stringstream li;
li<<sr;
long double ans;
li>>ans;
return ans;
}
string num_str(long double sr)
{
stringstream li;
li<<sr;
string ans;
li>>ans;
return ans;
}
int main()
{
vector <string> sr;
char li;
while(true)
{
sr.resize(1);
sr[0]="";
while((li=getchar())!='\n')
{
if(li!=' ') sr[sr.size()-1]+=li;
else
{
sr.push_back("");
}
}
for(int i=sr.size()-1;i>=0;i--)
{
if(sr[i]=="+"||sr[i]=="-"||sr[i]=="*"||sr[i]=="/")
{
if(sr[i]=="+")
{
sr[i]=num_str(str_num(sr[i+1])+str_num(sr[i+2]));
sr.erase(sr.begin()+i+1);
sr.erase(sr.begin()+i+1);
}
if(sr[i]=="-")
{
sr[i]=num_str(str_num(sr[i+1])-str_num(sr[i+2]));
sr.erase(sr.begin()+i+1);
sr.erase(sr.begin()+i+1);
}
if(sr[i]=="*")
{
sr[i]=num_str(str_num(sr[i+1])*str_num(sr[i+2]));
sr.erase(sr.begin()+i+1);
sr.erase(sr.begin()+i+1);
}
if(sr[i]=="/")
{
sr[i]=num_str(str_num(sr[i+1])/str_num(sr[i+2]));
sr.erase(sr.begin()+i+1);
sr.erase(sr.begin()+i+1);
}
}
}
cout<<sr[0];
}
}