have this but does not work any help will be appriciated inc

have this but does not work, any help will be appriciated.

#include <iostream>

#include <stack>

using namespace std;

int prec(char ch) {
if (ch == \'*\' or ch == \'/\')
return 2;
else if (ch == \'+\' or ch == \'-\')
return 1;
else if (ch == \'(\' or ch == \')\')
return 0;
}

int main() {

char ch;
stack<char> oper;

cin.get(ch);
while (!cin.eof()) {
if((ch>=\'0\' and ch<=\'9\')or
(ch >=\'a\' and ch <\'z\')or
(ch >\'A\' and ch <=\'Z\'))
// checking for operand
cout << ch;
else {
if (ch == \'(\') {
oper.push(ch);
}
else if (ch==\')\'){
while(!oper.empty() && (oper.top() !=\'(\')) {
cout << oper.top();
oper.pop();
}
if (!oper.empty()) {
oper.pop();
}
else cout << \"Error no matching (\";
  
}
else if (ch == \'*\' or ch ==\'/\' or ch == \'+\' or ch == \'-\') {
if (oper.empty() or prec(oper.top()) < prec(ch)){
// lower stack has lowest precedence
oper.push(ch);
}   
else {
while (!oper.empty() && prec(oper.top()) >= prec(ch)) {
cout << oper.top();
oper.pop();

}
oper.push(ch);
}
}
else {
cout << \" illegal character\";
}
cin.get(ch);
}
while (!oper.empty()) {
cout << oper.top();
oper.pop();
}
  
}
}

Solution

There are 2 mistakes due to which you got wrong answer :

I have corrected the code. THe corrected code is :

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