How to call main function in c++ from another function.

Answer 1

Call main(), why you need to do that anyway ?

Answer 2

You can call main like any normal function.
But it most likely will cause infinite loop
main() call f() call maim() call f() ...

Answer 3

The constructor/destructor pattern might work--you need the stack to pop--but calling main() from the destructor only works once:
https://code.sololearn.com/cCnk83IEL9Ff/?ref=app

[these C's should be portable to c++]
Here I use a fatal signal (a Floating Point Exception) to effectively GOTO. It's weird (why not just goto) but should be safe.
https://code.sololearn.com/c99KPGHr5FIb/?ref=app

...And here...I do call main repeatedly but...just for fun (don't do this); I'm jumping mid-instruction and falling through the 'constructor area' again; it leaks memory and should probably segfault (try removing the printf() to get Memory Limit Exceeded):
https://code.sololearn.com/cYgU9YGHlfD1/?ref=app

The point of including the last one is to emphasize: you have to pop the call stack (i.e. return or crash)
.

Answer 4

I am making a project on data handling.So I have to go to beginning of main function again and again

Answer 5

By the way, your clarification "go to the beginning again..." can be solved with this pattern:

int main() {
while(1==1) {
// ...stuff...
if(someTest==exitCondition) break;
}
return 0;
}

Answer 6

Randomzz - Lets Begin The Fun
Generally the patern would be this:

main()
{
init()
ret = main_loop() //real stuff happens here. It can be recursive or whatever.
deinit()
return ret
}