im using a menu, when u press 3 u exit the menu using the library #include <windows.h>
but my teacher haven't teached us that library so i need an alternative way to exit my program mayb with a return or something.
this is my menu:

int option;
printf("enter option \n");
printf("1- new sell \n");
printf("2- sell summary \n");
printf("3-exit \n");
scanf("%d",&option);
if(option==1)
{
nvent();
}
if(option==2)
{
summaryvent();
}
if(option==3)
{
exit(EXIT_SUCCESS);
}

can you just let it go out of scope? eg do nothing, and let main terminate

like this?
int option;
printf("enter option \n");
printf("1- new sell \n");
printf("2- sell summary \n");
printf("3-exit \n");
scanf("%d",&option);
if(option==1)
{
nvent();
}
if(option==2)
{
summaryvent();
}
if(option==3)
{

}

Depending on whether you have loops and what your method structure is, yeah.

just return 0;

this code seems simply enough to not be in its own function so im assuming its in your function labeled main. returning from main would exit the application.

damn didnt work

why you don't just replace the if's with a switch?



if it's not 1 or 2, then it does nothing... if your code ends after the switch/ifs, then this just ends your program too

return 0; if main is int;
return; if main is void;

If you would like any other help with java, i would be glad to tutor you. I don't charge a penny, absolutely free. I am an expert award by University of Waterloo (x86 assembly-coder). I have many years of experience with java, C++, Perl, OpenGl, Brainfuck, and even PL/I

Would you consider it?

except this isn't java.