C++ | main function error | beginners -

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• what should main() return in c , c++? 19 answers

i'm totally new c++ , i'm using eclipse.

but... don't know why error @ main function:

error: ::main must return int

my code is:

void main() { char a; while (a!='q') {     string ln = "enter option: ";     cout<< ln;      switch(a)     {     case 1:         if (a=='1')             func1();         break;     case 2:         if (a=='2')             break;         break;     } } } 

because in c++, main function must have return type of int.

your version return type of void incorrect , being correctly rejected compiler.

just change declaration from

void main() 

to

int main() 

there alternative form allows process arguments passed on command line program. looks this:

int main (int argc, char *argv[]) 

but when you're learning c++ , trying print "hello world" on screen, not need worry about. you'll there eventually.

and consider updating book you're using learn c++, too. if it's getting function signature of entry point wrong, other more complicated things might getting wrong?! no point in learning language wrong first time around. list of suggested books available here.