Compilare: user.cpp: In function ‘unsigned int nChoosek(unsigned int, unsigned int)’: user.cpp:14:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 2; i <= k; ++i) { ^ user.cpp: In function ‘int main()’: user.cpp:63:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d", &n, &k); ^ user.cpp:66:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%f", a + i); ^