Compilare: user.cpp: In function ‘int main()’: user.cpp:33:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,m,tip,x,y; ^ user.cpp:34:28: 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:42:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&tip,&x,&y); ^