Compilare: user.cpp: In function ‘int main()’: user.cpp:27:25: warning: unused variable ‘tx’ [-Wunused-variable] int n, m, i, c, x, y, tx, ty; ^ user.cpp:27:29: warning: unused variable ‘ty’ [-Wunused-variable] int n, m, i, c, x, y, tx, ty; ^ user.cpp:30:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d", &n, &m); ^ user.cpp:34:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d%d", &c, &x, &y); ^