以下能够实现计算5!的程序段是______。

A．int fac=1,k=0;do{k++;fac*=k;}while(k＜5);
B．int fac=0,k=1;do{fac*=k;k++;}while(k＜5);
C．int fac=1,k=1;do{k++;fac*=k;}while(k＜=5);
D．int fac=1,k=0;do{fac*=k;k++;}while(k＜5);