Stack.c

#include        <stdio.h>


#define CAPACITY 3

int stack[CAPACITY];

int top = -1;

void push(int x){

  if(top<CAPACITY - 1)
  {
      top = top + 1;
      stack[top]= x;
      printf("Succesfully added item: %d\n", x);
  }else{
        printf("Exception! No space\n");

  }


}

int pop()
{   if (top>=0){
    int val = stack[top];
    top = top -1;
    return val;
}	
	printf("Exception from pop! Empty stack\n");
    return -1;
}


int peek()
{   if(top >= 0){
    return stack [top];
}
    printf("Expection from peek! stack\n");
   return -1;
}

int main(){
	printf("Implementing my stack in c.\n");
	peek();
	push(10);
	push(20);
	push(30);
	printf("pop item : %d\n",pop());
	push(40);
	printf("Top of stack : %d\n",peek());

	return 0;
}