Upload files to "DS/C/Lab/Week3"

DS/C/Lab/Week3/Parenthesis.c

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+#include <stdio.h>
+#define MAX_SIZE 100
+
+char stack[MAX_SIZE];
+int top = -1;
+
+void push(char c) {
+    if (top < MAX_SIZE - 1) {
+        stack[++top] = c;
+    }
+}
+
+char pop() {
+    if (top >= 0) {
+        return stack[top--];
+    }
+    return '\0';
+}
+
+int is_matching_pair(char opening, char closing) {
+    return (opening == '(' && closing == ')') ||
+           (opening == '[' && closing == ']') ||
+           (opening == '{' && closing == '}');
+}
+
+int are_parentheses_balanced(char expr[]) {
+    int i;
+    for (i = 0; expr[i] != '\0'; i++) {
+        if (expr[i] == '(' || expr[i] == '[' || expr[i] == '{') {
+            push(expr[i]);
+        } else if (expr[i] == ')' || expr[i] == ']' || expr[i] == '}') {
+            if (top == -1 || !is_matching_pair(pop(), expr[i])) {
+                return 0;
+            }
+        }
+    }
+    return (top == -1);
+
+int main() {
+    char expr[MAX_SIZE];
+    printf("Enter an expression: ");
+    scanf("%s", expr);
+
+    if (are_parentheses_balanced(expr)) {
+        printf("Parentheses are balanced\n");
+    } else {
+        printf("Parentheses are not balanced\n");
+    }
+
+    return 0;
+}