Stack(Array)

#include<stdio.h>
#include<memory.h>
#include<stdlib.h>
int SIZE = 5,top = -1, stack[SIZE];
void menu();
void push();
void pop;
void peek();
void display();
int main(){
	int choice=0;
	do{
		system("cls");
		menu();
		printf("\nEnter your choice:");
		scanf("%d", &choice);
		switch(choice){
			case 1: push();
					break;
					
			case 2: pop();
					break;
					
			case 3: peek();
					break;
					
			case 4: display();
					break;
					
			default: printf("Thank you for using thid program");
					 break;
		}
		getch();
	}while(choice>0 && choice<5);
	return 0;
}

void menu(){
	printf("=========================================================");
	printf("                          Menu                           ");
	printf("=========================================================");
	printf("->Enter 1 for push operaton");
	printf("->Enter 2 for pop operaton");
	printf("->Enter 3 for peek operaton");
	printf("->Enter 4 for display operaton");
	printf("=========================================================");
}

void push(){
	int value=0,i=0;
	if(top== size-1){
		printf("Stack Overflow");
	}
	else{
		top++;
		printf("Enter your value:");
		scanf("%d",&value);
		stack[top] = value;
	}
	display();
}

void pop(){
	int value=0;
	if(top == -1){
		printf("Stack is empty");
	}
	else{
		value = stack[top];
		top--;
		printf("Poped value is %d",value);
	}
	display();
}

void peek(){
	if(top == -1){
		printf("Stack is empty");
	}
	else{
		printf("%d", stcak[top]);
	}
}

void display(){
	if(top == -1){
		printf("Stack is empty");
	}
	else{
		for(i=top;i>=0;i--){
			printf("%d", stack[i]);
		}
	}
}