Dit is de samenvatting van het eerste hoofdstuk van het vak Structuur van Computerprogramma's II. In deze samenvatting werd zowel alle relevante informatie uit de slides als informatie uit eigen notities opgenomen.
Hoofdstuk 1: Introductie
1 C in a Nutshell
• Statically typed general-purpose programming language
o Statically typed = you have to specify the data types
• Preprocessor, Compiler and Linker
o Not interpreted
• “Small” language
o thin layer of abstraction
o few keywords
o low runtime overhead
• C lacks
o run-time type safety
o exceptions
o range-checking
o garbage collection
o object-oriented programming
2 C is old so why should I care...
• Lingua franca of systems programming:
o OSs, like UNIX, Linux
o embedded processors (phones, portable electronics, ...)
o microcontrollers (cars, airplanes, ...)
▪ DSP processors (digital audio and TV systems)
o Often used as an intermediate language by implementations of other languages
▪ e.g. Python (CPython), Perl 5, PHP, Pico,…
3 Scheme vs. C
Scheme C
#include <stdio.h>
int main(void){
int x = 5;
printf(“Hello World\n");
printf(“%i”, x);
return0;
}
• main = entry point of a C program
• int voor de main → geeft int terug
• (void) na de functie → waar de parameters staan, nu void want neemt geen parameters
1
, 4 Compilatie
Oproepen compiler
Programma uitvoeren
• Compiler: compileert de code van 1 file tot object file
• Linker neemt verschillende object files van programma en headers en linkt deze samen met
eventueel verschillende libraries.
2
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