C Programming·The fundamentals of memory

Compilation and types

C is compiled ahead of time and has a small set of primitive types.

Beginner 12 min read Lesson 6 of 300 Challenge included

What you will be able to do

Use inttypes.h types such as int32_t when size matters.
Compile with -Wall -Wextra -Werror and fix every warning.
Include stdio.h before using printf.

In plain English

The compiler translates each source file into an object file and the linker combines them into an executable. Types describe size and representation. Integer overflow and implicit conversions are your responsibility, not the runtime’s.

hello.cC

#include <stdio.h>
#include <stdint.h>

int main(void) {
    int32_t minutes = 12;
    double rating = 4.8;
    printf("%d minute lesson, %.1f rating\n", minutes, rating);
    return 0;
}

Your turn

Print a lesson summary

Easy

Print "HTML: 8 lessons" using an int and a string.

C · starter

int lessons = 8;
printf("TODO");

Check your understanding before moving on.

Knowledge checkQuestion 1

What does the linker do?

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Lesson 6 of 300 · 0% of course