Created
October 16, 2019 17:37
-
-
Save surinoel/a3cfe105f0ce47e0bbde0b5349306d35 to your computer and use it in GitHub Desktop.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#include <stack> | |
#include <string> | |
#include <iostream> | |
using namespace std; | |
int getPriority(char c) { | |
if (c == '(') return 0; | |
else if (c == '+' || c == '-') return 1; | |
else if (c == '*' || c == '/') return 2; | |
} | |
int main(void) { | |
ios_base::sync_with_stdio(false); | |
cin.tie(nullptr); | |
string s; | |
cin >> s; | |
stack<char> st; | |
for (int i = 0; i < s.size(); i++) { | |
if (s[i] == '+' || s[i] == '-' || s[i] == '*' | |
|| s[i] == '/' || s[i] == '(' || s[i] == ')') { | |
if (s[i] == '(') { | |
st.push('('); | |
} | |
else if (s[i] == ')') { | |
while (!st.empty() && st.top() != '(') { | |
cout << st.top(); | |
st.pop(); | |
} | |
st.pop(); | |
} | |
else { | |
while (!st.empty() && getPriority(s[i]) <= getPriority(st.top())) { | |
cout << st.top(); | |
st.pop(); | |
} | |
st.push(s[i]); | |
} | |
} | |
else { | |
cout << s[i]; | |
} | |
} | |
while (!st.empty()) { | |
cout << st.top(); | |
st.pop(); | |
} | |
cout << '\n'; | |
return 0; | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment