stack.c

#include <stdio.h>
#include <stdlib.h>
#define MAX 100
int stack[MAX];
int top=-1;
int max=100;
void push(){
int value;
if(top==max-1){
printf("Stack is full\n");
}
else{
printf("Enter push item : ");
scanf("%d",&value);
top=top+1;
stack[top]=value;
printf("\n%d pushed to stack",value);
}
}
void display(){
int i;
if(top>=0){
for(i=0;i<=top;i++){
	printf("stack[%d] = %d \n",i+1,stack[i]);
}
}
else{
printf("stack is empty");
}
}
void peek(){
if(top>=0){
printf("top element is : %d",stack[top]);
}
else{
printf("stack is empty");
}
}
int main()
{
int opt;
do{
printf("\n..................\n");
printf("1)PUSH\n");
printf("2)POP\n");
printf("3)PEEK\n");
printf("4)DISPLAY\n");
printf("5)QUIET");
printf("\n..................\n");
printf("choose your option : ");
scanf("%d",&opt);
switch(opt){
case 1:push();
break;
case 2:pop();
break;
case 3:peek();
break;
case 4:display();
break;
case 5:exit(0);
default:printf("\nInvalid Operation! Try Again... \n");
}
}while(1);
return 0;
}