shorter code

[szyfuch]

Hello.

main(a){while(scanf("%d",&a)^-1)printf("%d\n",a*a+a>>1);}

My code have 58 symbols. Is somebody who can to find a shorter code? I know that in C can go up to 53 symbols.

[Moschops]

int main(){return 0;}

This code is shorter, and it's correct C++, and it compiles.

[zb0S216C]

main(a){while(scanf("%d",&a)^-1)printf("%d\n",a*a+a>>1);}

What's this all about?

[Duthomhas]

It is C, not C++, and it is perfectly valid on compilers that automatically #include <stdio.h> and accept the aberrant argument list.

That said, I don't think presuming EOF is -1 is very kosher either... Also, if this is anyhing other than playing around then you are making a mistake...

Other than all that, I don't see any way to shorten it...

[quirkyusername]

What in the name of holy beelzebub does this code do?

[Duthomhas]

transforms input numbers through the function

       │x2+x│
f(x) = │────│
       └  2 ┘