/*
 * programming_functions_mem.c
 *
 *  Created on: Oct 14, 2024
 *      Author: johnsontimoj
 */
///////////////////////////////////
//
// program to show some stack operations and variable scope
// note: the formal parameter and actual parameter names are duplicated intentionally
//
// inputs: user
// outputs: prints
//
/////////////////////////////////
#include <stdio.h>

///////////////////////////////
//
// Function prototypes (declarations)
//
///////////////////////////////
void splash(void);
int gt(int a, int b);		// poor choice of variable names
int read_int(void);
//
///////////////////////////////////
//
// main - just another function
//
/////////////////////////////////////
int main(void){
	setbuf(stdout, NULL);

	int a;
	int b;
	int c;

	splash();

	while(1){

		a = read_int();
		b = read_int();
		printf("variable a in main has value %i and is stored in memory at location %p\n", a, &a);
		printf("variable b in main has value %i and is stored in memory at location %p\n", b, &b);
		printf("variable c in main has value %i and is stored in memory at location %p\n", c, &c);
		printf("\n");

		c = gt(a, b);

		printf("The greater is %i\n", c);
		printf("\n");

	}// end while

	return 0;
}// end main

////////////////////////////////////////
//
// Function DEFINITIONS
//
//////////////////////////////////////

///////////////////////////////////
// splash
//
// function to print a splash screen
//
// inputs: none
// outputs: none
//
///////////////////////////////////
void splash(void){
	printf("---------------------------------\n");
	printf("--  This is prog_fns_mem\n");
	printf("---------------------------------\n");
	printf("\n");

	return;
}// end splash

///////////////////////////////////
// gt
//
// function to provide the greater of 2 ints
//
// inputs: 2 ints
// outputs: int - greater value
//
///////////////////////////////////
int gt(int a, int b){			// poor choice of variable names
    int res;
    static int cnt = 1;

	printf("variable a inside gt has value %i and is stored in memory at location %p\n", a, &a);
	printf("variable b inside gt has value %i and is stored in memory at location %p\n", b, &b);
	printf("variable res inside gt has value %i and is stored in memory at location %p\n", res, &res);
	printf("variable cnt inside gt has value %i and is stored in memory at location %p\n", cnt, &cnt);
	printf("\n");

	if(a > b)
		res = a;
	else
		res = b;

	printf("variable res inside gt has value %i and is stored in memory at location %p\n", res, &res);

	printf("count is %i\n\n", cnt);

	if(cnt == 5)
		printf("\nwhoo hoo\n\n");

	cnt++;

	return res;
}// end gt

///////////////////////////////////
// read_int
//
// function to ask for and return an int
//
// inputs: none
// outputs: int value entered
//
///////////////////////////////////
int read_int(void){
	int val;

	printf("please enter an int:");
	scanf("%i", &val);

	return val;
}// end read_int