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Please tell how to open a .exe file through fopen
fopen
is used to read or write in a file, not to launch an executable.
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i want to run exe within exe without system call
There is no other way.
In fact there is another way: you just have to duplicate that system call.
[Update]
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there surely are some ways possible to do so because if there is no such way then our operating system will also not work its basic lie in this concept
The OS establish rules to prevent conflicts between programs running at same time. What you want to do simply break all those rules.
You can do it, but you have to find how.