#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main()
{

/*
	- Learning basics of "printf", and some variables.
*/

	char characterName[] = "Tom";
	int characterAge = 58;

	printf("There once was a man named %s.\n", characterName);
	printf("He was %d years old.\n", characterAge);
	printf("He really liked his name %s.\n", characterName);

	characterAge = 34;

	printf("But he wanted to be younger.\n");
	printf("His dream was to be %d years old.\n", characterAge);

/*
	- Data Types
*/

	int age = 40;
	double gpa = 3.6;
	char grade = 'M';
	char phrase[] = "Giraffe Academy";

/*
	- Printf

	- %d - Normal number (int)
	- %f / %lf - Decimal Number (double, float)
	- %s - Normal text (char ..[])
	- %c - Single character (char)
*/

	int favNum = 14;
	char myText[] = "number";
	printf("\nMy favorite %s is %d\n", myText, favNum);

/*
	- Numbers

	- Pow
	- Sqrt
	- Ceil
	- Floor
*/

	printf("\nHow much upper-bound of 25.153?\n");
	printf("The answer is: %f\n", ceil(25.153) );

/*
	- Comments
*/

	printf("\nComments are fun!\n");

/*
	- Constants

	- Can't be modified, if you use "const"!
*/

	const int FAV_NUM = 5;
	printf("\nMy favorite number is: %d\n", FAV_NUM);

/*
	- Getting User Input

	- Scanf - Allowing user to answer questions, in
	 your program.

	- scanf - When you use it with string it's only going to grab the first characters what you typed.
	- fgets -
	- stdin - Storing the input what you typed, and it can be remember multiple words.
*/

	int yourAge;
	printf("\nEnter your age: \n");
	scanf("%d", &yourAge);
	printf("You are %d years old!\n", yourAge);

	double yourGpa;
	printf("\nEnter your gpa: \n");
	scanf("%lf", &yourGpa);
	printf("Your gpa is %f!\n", yourGpa);

	char yourGrade;
	printf("\nEnter your grade: \n");
	scanf("%c", &yourGrade);
	printf("Your grade is %c !\n", yourGrade);

	char yourName[20];
	printf("\nEnter your name: \n");
	fgets(yourName, 20, stdin);
	printf("Your name is %s!\n", yourName);

	return 0;
}