why the execution starts from main function
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Answer / ravi joshi
As many of them have answered here, main is a special
function in C/C++ programs. The compiler does not care if
you have defined main or not, but linker does. If linker
finds main defined in the objects being linked, then the
address of main function is placed at the top of execution
stack. And automatically when loader loads the
program/process, the main function gets loaded at the top of
execution stack, and system starts execution using
__crtmain() which internally calls main() of the program/process
| Is This Answer Correct ? | 16 Yes | 1 No |
Answer / vignesh1988i
it is the first function to be called or to be executed in
the code of the compiler.......
thank u
| Is This Answer Correct ? | 8 Yes | 1 No |
Answer / vignesh1988i
their will be a program written for creating a
compiler..... so in that main() may be a first function call
for that coding written in compiler
thank u
| Is This Answer Correct ? | 7 Yes | 0 No |
Answer / rahat
main is a special inbuilt function which is used to start
the execution of the program,and the compiler searches for
this function to start the execution of the program.
| Is This Answer Correct ? | 6 Yes | 2 No |
Answer / vamsi
the main function receives command line arguments and so if
v pass any command line arguments as in put they have to b
taken and executed for this reason the execution starts from
main
| Is This Answer Correct ? | 4 Yes | 1 No |
Answer / vrushali
The c run time system inserts some start up code before the
main function and inserts some clean up code at the end of
the program .
The operating system loads the executable of the program in
to the memory with the help of the loader and transfers the
control to theprogram .
| Is This Answer Correct ? | 2 Yes | 1 No |
Answer / vrushali
If the execution of a program is required to start from a
test program e.g test (). Then we are required to change the
linker itself. As there a default program which searches for
main .
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / rambo
in general _startup is handler for reset vector(0xffff in
freescale) _startup function calls main function.
if u replace main() with ur own function then the system
call ur function.
| Is This Answer Correct ? | 0 Yes | 1 No |
Answer / abhradeep chatterjee
when c compiler searches for the beginning of the program,
then it looks for the main function.
| Is This Answer Correct ? | 2 Yes | 4 No |
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