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  1. #include <iostream>
  2. #include <stack>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	stack<int>st;
  7. 	char x;
  8. 	while(cin>>x){
  9. 		if(x>='0' and x<='9') 
  10. 		st.push(x-'0');
  11. 		if(x=='+'){
  12. 			int a=st.top();
  13. 			st.pop();
  14. 			int b=st.top();
  15. 			st.pop();
  16. 			st.push(a+b);
  17. 		}
  18. 		else if(x=='-'){
  19. 			int a=st.top();
  20. 			st.pop();
  21. 			int b=st.top();
  22. 			st.pop();
  23. 			st.push(b-a);
  24. 		}
  25. 		else if(x=='*'){
  26. 			int a=st.top();
  27. 			st.pop();
  28. 			int b=st.top();
  29. 			st.pop();
  30. 			st.push(a*b);
  31. 		} 
  32. 	} cout<<st.top();
  33. 	return 0;
  34. }
Success #stdin #stdout 0.01s 5296KB
comments (?)
stdin
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8 9 + 1 7 - *
stdout
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-102
https://ideone.com/xie1sy
language:
C++ (gcc 8.3)
created:
6 days ago
visibility:
public

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