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comment this for Windows */
#include <stdlib.h>
int testit ( int *x )
{
if (x != NULL) {
... ocation of memory failed.\n");
}
return 0;
}
int main ( void )
{
int *buffer;
printf("set buffer to 100 * sizeof(int)\n");
buffer = (int*) malloc (100*sizeof(int));
testit(buffer);
printf("set buffer to 1000 * sizeof(int)\n");
buffer = (int*) calloc (1000,sizeof(int));
testit(buf
f_bits
====Parameters ====
variable - (byte, int, long)
number_of_bits integer <= 32
====Example: ====
int a = 5; // binary: 0000000000000101
int b = a << 3; // binary: 0000000000101000, or 40 in decimal
int c = b >> 3; // binary: 0000000000000101, or back to 5 like we s... re lost, literally shifted out of existence:
int a = 5; // binary: 0000000000000101
int
//code-reference.com/c/compiler/gcc/warnings
*/
int main (void )
{
int i=0;
printf("%i\n",i);
/* to ...
</code>
===== warning: return type defaults to ‘int’ =====
Add a return type to your function:
<code... /* code example warnings return type defaults to ‘int’
* http://code-reference.com/c/compiler/gcc/warnings
*
* you must add a "int" before and ( void ) after the function
* for this example
* chang
operand2) - returned result
In Arduino, the type int is a 16-bit value, so using & between two int exp... perations to occur. In a code fragment like:
int a = 92; // in binary: 0000000001011100
int b = 101; // in binary: 0000000001100101
int c = a & b; // result: 0000000001000100, or ... he bitwise OR used in a snippet of C++ code:
int a = 92; // in binary: 0000000001011100
in
comment this for Windows */
#include <stdlib.h>
int testit ( int *x )
{
if (x != NULL) {
... cation of memory failed.\n");
}
return 0;
}
int main ( void )
{
int *buffer;
printf("set buffer to 100 * sizeof(int)\n");
buffer = (int*) malloc (10*sizeof(int));
testit(buffer);
printf("set buffer to 10 * sizeof(int)\n");
buffer = (int*) realloc (buffer,10*sizeof(int));
testit(bu
mment this for Windows */
#include <stdlib.h>
int testit ( int *x )
{
if (x != NULL) {
... cation of memory failed.\n");
}
return 0;
}
int main ( void )
{
int *buffer, i;
printf("how many int to malloc ?: ");
scanf("%i", &i);
printf("set buffer to %i * %i = %d bytes\n",i, sizeof(int), i*sizeof(int));
buffer = (int*) malloc (i*sizeof(int)); // i * size of int... eg. 100 *
===
<code c>
#include <graphics.h>
void ellipse(int x, int y, int stangle, int endangle, int xradius, int
yradius);
</code>
==== Description of ellipse ====
<code c>
ellipse draws an elliptical ar... <stdlib.h>
#include <stdio.h>
#include <conio.h>
int main(void)
{
/* request autodetection */
int gdriver = DETECT, gmode, errorcode;
int midx, midy;
int stangle = 0, endangle = 360;
int
rand ======
<code c>
#include <stdlib.h>
int rand(void);
</code>
===== Description =====
Gener... stdlib.h>
#include <time.h> /* for srand salt */
int main ( void )
{
int i;
/* initialize random ... ple will generate a random number between 2 given int numbers\\
<code c>
/*
* rand example code
* ht... <stdio.h>
#include <stdlib.h>
#include <time.h>
int rand_between(int min, int max);
int mai
====
<code c>
#include <graphics.h>
void sector(int x, int y, int stangle, int endangle, int xradius, int
yradius);
</code>
==== Description of sector ====
<code c>
Draws and fills an elliptical p... <stdlib.h<
#include <stdio.h<
#include <conio.h<
int main(void)
{
/* request autodetection */
int gdriver = DETECT, gmode, errorcode;
int midx, midy, i;
int stangle = 45, endangle = 135;
======int ======
====Description ====
Integers are your primary data-type for number storage.
O... Arduino Uno (and other ATMega based boards) an //int// stores a 16-bit (2-byte) value. This yields a r... alue of (2^15) - 1). \\
On the Arduino Due, an //int// stores a 32-bit (4-byte) value. This yields a r... e of -2^31 and a maximum value of (2^31) - 1).
//int//'s store negative numbers with a technique calle
mple reference}}
===== fscanf =====
<code c>
int fscanf(FILE *stream, const char *format, ...);
</... \\
h argument is pointer to short rather than int\\
l argument is pointer to long rather than int, or double rather than float\\
L argument is pointer to long double rather than float\\
\\
conversion character:\\
d decimal integer; int* parameter required\\
i integer; int* parameter
reference}}
====== fprintf ======
<code c>
int fprintf(FILE *stream, const char *format, ...);
<... *, value taken from next argument (which must be int).\\
optional . (separating width from precision)\... *, value taken from next argument (which must be int).\\
\\
optional length modifier:\\
h short or u...
L long double\\
conversion character:\\
d,i int argument, printed in signed decimal notation\\
o