This document summarizes the most commonly used functions within C, with name, way of programming and output. NOTE: some parts may be Dutch, but the programming stays the same nontheless.
0 1 0 0 1 1 0 1
0 0 1 1 0 1 0 1 0 1 0 0 1 1 0 1
------------------ | OR ------------------ ~ inverter
0 1 1 1 1 1 0 1 1 0 1 1 0 0 1 0
shifting shift left ( a << b) shift right ( a >> b)
a << 1 is gelijk aan a * 2 a >> 1 is gelijk aan a / 2
voorbeeld: 00001010 << 2 = 00101000 (dec. 10 -> dec. 40)
compound In C geldt: a += b; is hetzelfde als: a = a + b;
assignment Zo ook: a &= b; is hetzelfde als: a = a & b;
operator
Overzicht alle operatoren:
bit operatie byteValue |= 1 << 2; // set bit 2 op 1
byteValue &= ~(1 << 2); // set bit 2 op 0
print number void print_0_to_15() { 0= 0000 8= 1000
char i; 1= 0001 9= 1001
with bitwise for (i=0; i<=15; i++) { 2= 0010 10= 1010
operation printf("%2d= ", i); 3= 0011 11= 1011
print_char_binair(i); 4= 0100 12= 1100
printf("\n"); 5= 0101 13= 1101
} 6= 0110 14= 1110
} 7= 0111 15= 1111
include // om dubbele includes te voorkomen kun je gebruik maken van:
#ifndef PROGRAM1_H // if not defined: ‘PROGRAM1_H
#define PROGRAM1_H // define: ‘PROGRAM1_H’
[code voor program1.h]
#endif // end if defined
pointer int i = 8; // integer i met waarde 8
int *p; // pointer naar een integer /* - int i krijgt random adres 268
p = &i; // inhoud pointer - int pointer (*) p
p = adres van i - p krijg als inhoud 268 adres
printf("%d", *p); // print inhoud waar - *p = inhoud i (* heft & op)
pointer naar wijst */
8
struct struct datum {
uint8_t dag;
uint8_t maand;
uint16_t jaar;
}; // let op: puntkomma
int main() {
struct datum vandaag;
vandaag.dag = 19;
vandaag.maand = 9;
vandaag.jaar = 2017;
struct datum morgen = { 20, 9, 2017 };
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