Compilare: user.cpp: In function ‘void bkt(int, int)’: user.cpp:21:9: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(fol[i]==0) ^ user.cpp: In function ‘int main()’: user.cpp:41:29: warning: unused variable ‘cn’ [-Wunused-variable] int m, i, num, d, nrad, cn; ^ user.cpp:43:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &m); ^ user.cpp:46:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &num); ^ user.cpp:71:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &prime[i]); ^