Answer to Question #46264 in C for erico fire

Question

write a program to implement the stacks using the concept of arrays.

Answer 1

#include <stdio.h>
#define MAX_STACK_SIZE 64
int stack[ MAX_STACK_SIZE ];
int sizeOfStack = 0;
void push( int val );
int pop();
/**
Realise int stack
constanct MAX_STACK_SIZE is max size of stack
*/
int main() {
    printf("Hello, It's stack program.\n");
    printf("push: 1, 2, 3\n");
    push(1);
    push(2);
    push(3);
    printf("Pop 4 elements:\n");
    printf("%d\n", pop());
    printf("%d\n", pop());
    printf("%d\n", pop());
    printf("%d\n", pop());
    return 0;
}
/**
Push element to the stack.
If stack is not overflow
*/
void push( int val ) {
    if ( sizeOfStack < MAX_STACK_SIZE ) {
        stack[sizeOfStack] = val;
        sizeOfStack++;
    } else {
        fprintf( stderr, "ERROR: Stack is overflow" );
    }
}
/**
Return element from the stack.
If stack is not empty
*/
int pop() {
    if ( sizeOfStack > 0 ) {
        return stack[--sizeOfStack];
    } else {
        fprintf( stderr, "ERROR: Stack is empty\n" );
    }
    return -1;
}