Compilare: user.cpp: In function ‘int main()’: user.cpp:43:29: warning: too many arguments for format [-Wformat-extra-args] fscanf(fin, "%d", &n, &k); ^ user.cpp:43:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n, &k); ^ user.cpp:47:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &v[i], &c[i]); ^