Entries tagged as: C++

2014
10-26

my own sin and cos implementation in C / C++

Here is my own implementation of sin and cos functions in C language. It's may be usedful if you want to compile very small exe file, without using standard libc.
  1. float cos(float x){
  2. if( x < 0.0f )
  3. x = -x;
  4. while( M_PI < x )
  5. x -= M_2_PI;
  6. return 1.0f - (x*x/2.0f)*( 1.0f - (x*x/12.0f) * ( 1.0f - (x*x/30.0f) * (1.0f - x*x/56.0f )));
  7. }
  8.  
  9. float sin(float x){return cos(x-M_PI_2);}
  10.  
2014
10-05

how to compile 64KB exe in visual 2012 without CRT

CRT (C Run Time) is library installed with visual studio that is usually required by exe files created by visual studio.
If you just copy exe file to other computer it may not work. You need to install on other computer CRT.
So if you want to create 64KB intro for demoscene that don't need any aditional dll's then you need to go around it.
(more…)
2014
10-05

how to use 4klang 3.0.1

1. after you get 4kalng.h and 4klang.inc files from your music friend, copy them to 4klang_sources/3.0.1/
2. run in that directory command nasmw.exe -fwin32 -o "4klang.obj" 4klang.asm
3. File 4klang.obj copy to your Visual C++ project.
4. Go to project settings / Linker / Input / Additional Dependencies, and add 4klang.obj there.
5. Copy example *.cpp from 4klang examples to your main C++ file.
2014
10-05

how to create 1KB exe for demoscene (start for 1KB or 4KB intro)

Here is instruction how to make very small *.exe file with simple animation.
(more…)
2010
10-17

C++ lesson 2 – variables

In that lesson I will describe what are variables. (more…)
2010
09-26

C++ lesson 1 – print text

Basic lesson of programing in C++. I will show how to print text at screen. (more…)
2010
09-25

C++ lesson 0 – compiler

In this lesson I will help you do decide which C++ compiler select. I will describe here Microsoft Visual C++ Express, Microsoft Visual Studio Profesional, Codeblocks and g++. Of course you can use different one if you want. (more…)