stacks using arrays

Author: utk2103

stack_using_arr.c

@@ -0,0 +1,69 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#define MAX 5
+int top = -1;
+int stack[MAX];
+
+void push();
+void pop();
+void traverse();
+
+int main() {
+    int ch;
+    do {
+        printf("\n 1. PUSH ");
+        printf("\n 2. POP");
+        printf("\n 3. Traverse/Display");
+        printf("\n 4. Exit ");
+        printf("\n Enter your choice: ");
+
+        scanf("%d", &ch);
+        switch (ch) {
+            case 1:
+                push();
+                break;
+            case 2:
+                pop();
+                break;
+            case 3:
+                traverse();
+                break; 
+            case 4:
+                exit(0);
+            default:
+                printf("INVALID CHOICE");
+                break;
+        }
+    } while (ch != 4);
+
+    return 0;
+}
+
+void push() {
+    int m;
+    if (top == MAX - 1) {
+        printf("Stack Overflow");
+        return;
+    }
+    printf("Input the new element: ");
+    scanf("%d", &m);
+    top++;
+    stack[top] = m;
+}
+
+void pop() {
+    if (top == -1) {
+        printf("Stack is empty or underflow");
+        return;
+    }
+    stack[top] = 0;
+    top--;
+}
+
+void traverse() {
+    int i;
+    for (i = top; i >= 0; i--) {
+        printf("%d\n", stack[i]);
+    }
+}