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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. // Function to generate 3-address code from postfix expression
  5. void generateTAC(string expr) {
  6.     stack<string> st;
  7.     int temp = 1;
  8.  
  9.     for (char c : expr) {
  10.         if (isalnum(c)) {
  11.             st.push(string(1, c)); // Operand
  12.         } else { // Operator
  13.             string op2 = st.top(); st.pop();
  14.             string op1 = st.top(); st.pop();
  15.             string t = "t" + to_string(temp++);
  16.             cout << t << " = " << op1 << " " << c << " " << op2 << endl;
  17.             st.push(t);
  18.         }
  19.     }
  20.  
  21.     // Final result
  22.     if (!st.empty()) {
  23.         cout << "Result = " << st.top() << endl;
  24.     }
  25. }
  26.  
  27. int main() {
  28.     string expr;
  29.     cout << "Enter postfix expression: ";
  30.     cin >> expr;
  31.  
  32.     cout << "\nThree-Address Code:\n";
  33.     generateTAC(expr);
  34.  
  35.     return 0;
  36. }
Success #stdin #stdout 0s 5320KB
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stdin
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Standard input is empty
stdout
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Enter postfix expression: 
Three-Address Code:
https://ideone.com/5LFp50
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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