C coding basics

I'm bored

C-code Basics

Just the basics of C

Any command ends with semi-colon => ;

Libraries

#include <library>

stdlib.h = standard library

stdio.h = input/output library

math.h = for maths

array.h = you won't need here, but it's good to know that it exists

print word

printf("enter letters here\n");

\n = new line

user input (number)

float = ex. 23.455

float n;

scanf("%f", &n);

int = ex. 23

int n;

scanf("%i", &n); 

char = symbols, letters

char n;

scanf("%c", &n);

(only one letter input!)

Program Example

#include <stdio.h>

#include <stdlib.h>

int main(void) {

int age;

float number, favnumb;

char letter; 

do {

printf("Please enter your age");

scanf("%i",&age);

while(age <0) {

printf("\nError age must be bigger or equal to 0\n please enter age");

scanf("%i",&age); }

printf("\nwhat is your favourite number?\n");

scanf("%f", &favnumb); 

printf("\n do you want to repeat the process?");

scanf("%c", &letter);

if(letter == 'y') {

printf("let's start again); }

else if(letter =='Y'){

printf("alright, let's start again); }

else{

do {

printf("please enter y or n");

scanf("%c"&letter);

} while(letter != 'y' || letter != 'Y')

} while (letter == 'y' || letter == 'Y')

printf("Goodbye");

return 0; }