斐波纳契数列中头两个数是0和1，从第三个数开始，每个数等于前两个数的和，即：0,1,1,2,3,5,8,13,21,……等。求斐波纳契数列的前20个数。要求每行输出5个数。请填空。
#include
main()
{intf,f1,f2,I;
printf(“Fibonacciseries:/n”);
f1=0;f2=________________________________;
printf(“%6d,%6d,”,f1,f2);
for(I=3;I<=20;_________________________)
{f=________________________________;
printf(“%6d,”,f);
if(________________________________)
printf(“/n”);
f1=f2;f2=________________________________;
}
printf(“/n”);
}