# include <stdio.h> # include <string.h> int s(int a) { return a*a; } int main( int argc, char* argv[]) { int k = s(5); return 0; }
Standard input is empty
prog.c: In function ‘main’: prog.c:9:9: error: unused variable ‘k’ [-Werror=unused-variable] int k = s(5); ^ cc1: all warnings being treated as errors
Standard output is empty