Compilare: user.cpp: In function ‘int main()’: user.cpp:24:11: warning: unused variable ‘fout’ [-Wunused-variable] FILE *fout = fopen("triangles.out", "w"); ^ user.cpp:27:33: 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:30:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &b[i]); ^