71 lines
1.3 KiB
C++
71 lines
1.3 KiB
C++
#include <bits/stdc++.h>
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using namespace std;
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bool areBracketsBalanced (string expr)
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{
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stack < char >s;
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char x;
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// Traversing the Expression
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for (int i = 0; i < expr.length (); i++)
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if (expr[i] == '(' || expr[i] == '[' ||expr[i] == '{')
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{
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// Push the element in the stack
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s.push (expr[i]);
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continue;
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}
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// IF current current character is not opening
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// bracket, then it must be closing. So stack
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// cannot be empty at this point.
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if (s.empty ())
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return false;
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switch (expr[i])
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{
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case ')': // Store the top element in a
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x = s.top ();
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s.pop ();
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if (x == '{' || x == '[')
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return false;
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break;
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case '}': // Store the top element in b
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x = s.top ();
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s.pop ();
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if (x == '(' || x == '[')
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return false;
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break;
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case ']': x = s.top ();
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s.pop ();
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if (x == '(' || x == '{')
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return false;
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break;
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}
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}
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return (s.empty ());
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}
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// Driver code
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int main ()
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{
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string expr = "{()}[]";
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// Function call
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if (areBracketsBalanced (expr))
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cout << "Balanced";
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else
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cout << "Not Balanced";
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return 0;
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}
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// Output:-
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// Enter the brackets to check if its balanced or not : [{}]
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// Balanced
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// Enter the brackets to check if its balanced or not : {]
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Not Balanced
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