The code is based on the popularly used dda line drawing algorithm.It picks up two point from the window and change the color of pixels which are closest to vectorial line between them.
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How to Use Template Class or Function in C++ (Stack Implemantation)

1-How to use a function with different data types in c++. i mean, i have a function
that name is abs() and i want to use it just like this:
int x;foo(x); or
float x;foo(x); or
char x;foo(x)…
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c++ stack codes

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A command-line argument is the information that follows the name of the program on the command line of the operating system.

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