Compilare: user.c: In function ‘main’: user.c:55:21: warning: unused variable ‘mark’ [-Wunused-variable] int ii,p,u,pneg,mark; ^ user.c:55:16: warning: unused variable ‘pneg’ [-Wunused-variable] int ii,p,u,pneg,mark; ^ user.c:55:14: warning: unused variable ‘u’ [-Wunused-variable] int ii,p,u,pneg,mark; ^ user.c:55:12: warning: unused variable ‘p’ [-Wunused-variable] int ii,p,u,pneg,mark; ^ user.c:55:9: warning: unused variable ‘ii’ [-Wunused-variable] int ii,p,u,pneg,mark; ^ user.c:56:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("rover.in","r",stdin); ^ user.c:57:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("rover.out","w",stdout); ^