c++语句改成c语言，关于c语言输出

Question

cout << prices[i] <<setw(15)<< units[i] <<setw(15) << amounts[i] << endl;
我知道cout是printf,后面那些都是啥啊。。

Answer 1

printf("%d%15d%15d\n",prices[i] ,units[i],amounts[i]);