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DS/C/Lab/Week3/MulSta.c

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+#include <stdio.h>
+#define MAX_SIZE 100
+#define NUM_STACKS 3
+
+int tops[NUM_STACKS] = {-1, -1, -1};
+int stack[MAX_SIZE];
+int stack_size = MAX_SIZE / NUM_STACKS;
+
+void push(int stack_num, int value) {
+    int index = stack_num * stack_size + tops[stack_num] + 1;
+    if (tops[stack_num] < stack_size - 1) {
+        tops[stack_num]++;
+        stack[index] = value;
+        printf("Pushed %d to stack %d\n", value, stack_num);
+    } else {
+        printf("Stack %d is full\n", stack_num);
+    }
+}
+
+int pop(int stack_num) {
+    int index = stack_num * stack_size + tops[stack_num];
+    if (tops[stack_num] >= 0) {
+        int value = stack[index];
+        tops[stack_num]--;
+        printf("Popped %d from stack %d\n", value, stack_num);
+        return value;
+    } else {
+        printf("Stack %d is empty\n", stack_num);
+        return -1;
+    }
+}
+
+int main() {
+    push(0, 10);
+    push(0, 20);
+    push(1, 30);
+    push(2, 40);
+
+    pop(0);
+    pop(1);
+    pop(2);
+    pop(2);
+
+    return 0;
+}