/*
 * programming_functions_cont.c
 *
 *  Created on: Oct 10, 2023
 *      Author: johnsontimoj
 */

/////////////////////////////////
//
// Program to practice some functions - continued
//
// inputs - from user
// outputs - some prints
//
///////////////////////////////////
#include <stdio.h>
#include <math.h>

///////////////////
// function declarations (prototypes)
////////////////////
char capitalize(char val);

int read_int(void);
char read_char(void);
float read_float(void);

int main(void){		// we now know this is just a function
	setbuf(stdout, NULL);

	char a;

	// call capitalize function
//	printf("Please enter a character: ");
//	scanf(" %c", &a);		// don't forget the space before the %c
	a = read_char();
	a = capitalize(a);		// remember, the value of a is passed into the function, not the variable
	printf("a is: %c\n", a);

	return 0;		// we know this is required by the function definition
}// end main

///////////////////////////
// function definitions
//////////////////////////

//////////////////////////////////////
// capitalize
//
// function to return the capital of a letter
// ignores non letter inputs
//
// input: letter as a char
// output: capital letter as a char
////////////////////////////////////////
char capitalize(char val){
	char tmp_val;

	if((val >= 'a') && (val <= 'z'))
		tmp_val = val - 0x20;
	else
		tmp_val = val;

	return tmp_val;
}// end capitalize



/////////////////////////////
// Helper functions
////////////////////////////

//////////////////////////////////////
// read_int
//
// function to ask for and read in an int
//
// input: none
// output: returns the int
////////////////////////////////////////
int read_int(void){
	int val;

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

	return val;
}// end read_int

//////////////////////////////////////
// read_float
//
// function to ask for and read in a float
//
// input: none
// output: returns the float
////////////////////////////////////////
float read_float(void){
	float val;

	printf("please enter a float: ");
	scanf("%f", &val);

	return val;
}// end read_float

//////////////////////////////////////
// read_char
//
// function to ask for and read in a char
//
// input: none
// output: returns the char
////////////////////////////////////////
char read_char(void){
	char val;

	printf("please enter a char: ");
	scanf(" %c", &val);

	return val;
}// end read_char