Compilare: user.cpp: In function ‘int interogate(int)’: user.cpp:12:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,aux; ^ user.cpp: In function ‘int main()’: user.cpp:33:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&n,&m); ^ user.cpp:37:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&c,&x,&y); ^