Stack In C

Stack in C

@@ -0,0 +1,71 @@
+#include <stdio.h>
+
+int MAXSIZE = 8;       
+int stack[8];     
+int top = -1;            
+
+int isempty() {
+
+   if(top == -1)
+      return 1;
+   else
+      return 0;
+}
+
+int isfull() {
+
+   if(top == MAXSIZE)
+      return 1;
+   else
+      return 0;
+}
+
+int peek() {
+   return stack[top];
+}
+
+int pop() {
+   int data;
+
+   if(!isempty()) {
+      data = stack[top];
+      top = top - 1;   
+      return data;
+   } else {
+      printf("Could not retrieve data, Stack is empty.\n");
+   }
+}
+
+int push(int data) {
+
+   if(!isfull()) {
+      top = top + 1;   
+      stack[top] = data;
+   } else {
+      printf("Could not insert data, Stack is full.\n");
+   }
+}
+
+int main() {
+   // push items on to the stack 
+   push(3);
+   push(5);
+   push(9);
+   push(1);
+   push(12);
+   push(15);
+
+   printf("Element at top of the stack: %d\n" ,peek());
+   printf("Elements: \n");
+
+   // print stack data 
+   while(!isempty()) {
+      int data = pop();
+      printf("%d\n",data);
+   }
+
+   printf("Stack full: %s\n" , isfull()?"true":"false");
+   printf("Stack empty: %s\n" , isempty()?"true":"false");
+
+   return 0;
+}