Compilare: user.cpp: In function ‘int main()’: user.cpp:28:33: 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:31:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%f", &p[i]); ^ user.cpp: In function ‘float dinamic()’: user.cpp:17:29: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] r += p[i] * p[j]; ^