How to Graph a Sine Wave in C++

Computer programming is complex, but if you're well-versed in a programming language such as C++, the possible applications are virtually infinite. Even Microsoft Windows runs on C++. Graphing a sine wave using C++ is one exercise that will help familiarize you with the language. In trigonometry, a sine curve is represented by the formula f (x) = a*sin (bx + c) and has a repeating, undulating, trough-to-peak pattern.

Instructions

1. Open the code editor.

2. Type in, "#include <cstdio>

   #include <cmath>

   #include <windows.h>

   int main(void)

   {

   int x, y;

   COLORREF yellow = RGB(255,255,0);

   COLORREF lightblue = RGB(173,216,230)."

3. Add the code, "SetConsoleTitle("ConGraphics");

   HWND hWnd = FindWindow(NULL, "ConGraphics");

   HDC hDC = GetDC(hWnd);

   // draw a yellow sine curve

   for(x = 0; x < 700; x++)

   {

   // center at y = 200 pixels

   y = (int)(sin(x/100.0)*100 + 200);

   SetPixel(hDC, x, y, yellow)."

4. Finish by typing, "// draw center line

   for(x = 0; x < 700; x++)

   {

   SetPixel(hDC, x, 200, lightblue);

   }

   ReleaseDC(hWnd, hDC);

   DeleteDC(hDC);

   getchar(); // wait

   return 0."

References

• Daniweb; Plot a Sine Wave to the Console; March 2005