#include <stdio.h> int main(){ struct x {int a; int b;}; printf("%d", sizeof(x)); return 0;}
Standard input is empty
prog.c:5:22: error: use of undeclared identifier 'x' printf("%d", sizeof(x)); ^ 1 error generated.
Standard output is empty
The brand new service which powers Ideone!
Widget for compiling and running the source code in a web browser!