Compilare: user.cpp: In function ‘int comb(int, int, int, FILE*)’: user.cpp:16:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:21:13: warning: unused variable ‘pos’ [-Wunused-variable] int n, k, pos; ^ user.cpp:22:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &k); ^