Compilare: user.cpp: In function ‘int main()’: user.cpp:53:9: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int ok=1; ^ user.cpp:48:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d %d",&X,&Y,&n,&L); ^ user.cpp:57:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&pas); ^