计算并输出1!+2!+3!+4!+5!的值。# includeint f (int a){ static int c=1；c=c*a；return_________；／*第一空*／}void main (){ int i，k；k=_________；／*第二空*／for (i=2；i<=5；i++) k+=f(_________)；／*第三空*／printf (“%d\n”，k)；}