Compilare: user.cpp: In function ‘int main()’: user.cpp:11:30: warning: unused variable ‘da’ [-Wunused-variable] int n, m, i, j, max, x, y, da, min, nr, l; ^ user.cpp:11:39: warning: unused variable ‘nr’ [-Wunused-variable] int n, m, i, j, max, x, y, da, min, nr, l; ^ user.cpp:12:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &m); ^