How can i open a .exe file from my c++ program?

I am wondering how can i open a .exe file with my c++ program. Could some one give me the source code?

Executing system commands - Cprogramming.com

just out of curiosity, how would I do something like this in non-windows operating systems?

Same.

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Originally Posted by killme

just out of curiosity, how would I do something like this in non-windows operating systems?

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I suggest reading this for other options under Linux.
c - Difference between "system" and "exec" in Linux? - Stack Overflow

Tim S.

And a Windows specific alternative:

ShellExecute function (Windows)

Of course it all depends on what you mean by opening an exe. One can open an exe for reading in the same way one opens a data file. A hes editor would do this, for example.

Generally the terms such as "launch", "start" or "run" are used to indicate that you want the program to execute.