void f() { unsigned int x=2, last_x=3; int dx; dx = static_cast<int>(x - last_x); }
Standard input is empty
prog.cpp: In function ‘void f()’: prog.cpp:4:9: warning: variable ‘dx’ set but not used [-Wunused-but-set-variable] int dx; ^ /usr/lib/gcc/i486-linux-gnu/4.8/../../../i386-linux-gnu/crt1.o: In function `_start': (.text+0x18): undefined reference to `main' collect2: error: ld returned 1 exit status
Standard output is empty