Stack Implementation Using Array C Program

#include<stdio.h> #define MAXSIZE 5 void push(); int pop(); void peek(); int isEmpty(); int isFull(); int stk[MAXSIZE]; int top = -1; void main() { int value, choice; while(1) { printf("Enter choice.\n1. Push\n2. Pop\n3. Display\n4. Exit\n"); scanf("%d",&choice); switch(choice) { case 1: if(isFull()) { printf("Cannot push. Overflow.\n"); break; } printf("Enter number\n"); scanf("%d",&value); push(value); break; case 2: if(isEmpty()) { printf("Cannot pop. Underflow.\n"); break; } value = pop(); printf("Value popped = %d\n",value); break; case 3: peek(); break; case 4: return; } } } int isFull() { if(top == MAXSIZE-1) return 1; return 0; } int isEmpty() { if(top == -1) return 1; return 0; } void push(int value) { stk[++top] = value; } int pop() { int value = stk[top--]; return value; } void peek() { int i; for(i=0;i<=top;i++) printf("%d ",stk[i]); printf("\n"); }

Stack program in C using Array