Compilare: user.cpp: In function ‘int BF(int)’: user.cpp:11:25: warning: unused variable ‘j’ [-Wunused-variable] int prim, ultim, i, j, k, vf, x, y, q[505]; ^ user.cpp:11:28: warning: unused variable ‘k’ [-Wunused-variable] int prim, ultim, i, j, k, vf, x, y, q[505]; ^ user.cpp:11:38: warning: unused variable ‘y’ [-Wunused-variable] int prim, ultim, i, j, k, vf, x, y, q[505]; ^ user.cpp: In function ‘int main()’: user.cpp:57:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &T); ^ user.cpp:60:37: 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:63:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &x, &y); ^