Compilare: user.cpp: In function ‘int main()’: user.cpp:15:27: warning: unused variable ‘b’ [-Wunused-variable] int n, i, j, k, max, a, b; ^ user.cpp:16:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &k); ^ user.cpp:22:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &a); ^