Compilare: user.cpp: In function ‘int main()’: user.cpp:39:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d%d", &n, &k, &a, &b); ^ user.cpp: In function ‘void avans()’: user.cpp:15:26: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(s, 1, LIM, fin); ^