Compilare: user.cpp: In function ‘int main()’: user.cpp:17:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d%d%d", &p, &n, &m, &t); ^ user.cpp:20:46: 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, &l, &c); ^ user.cpp:15:33: warning: ‘aux’ may be used uninitialized in this function [-Wmaybe-uninitialized] int p, n, m, t, x, y, l, c, aux; ^