功能:编写函数求3!+6!+9!+12!+15+18!+21!.------------------------------------------------*/ #includ功能:编写函数求3!+6!+9!+12!+15+18!+21!.------------------------------------------------*/#include void wwjt(); float sum(int n){//}main
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/27 09:41:59
![功能:编写函数求3!+6!+9!+12!+15+18!+21!.------------------------------------------------*/ #includ功能:编写函数求3!+6!+9!+12!+15+18!+21!.------------------------------------------------*/#include void wwjt(); float sum(int n){//}main](/uploads/image/z/5913009-9-9.jpg?t=%E5%8A%9F%E8%83%BD%EF%BC%9A%E7%BC%96%E5%86%99%E5%87%BD%E6%95%B0%E6%B1%823%21%2B6%21%2B9%21%2B12%21%2B15%2B18%21%2B21%21.------------------------------------------------%2A%2F+%23includ%E5%8A%9F%E8%83%BD%EF%BC%9A%E7%BC%96%E5%86%99%E5%87%BD%E6%95%B0%E6%B1%823%21%2B6%21%2B9%21%2B12%21%2B15%2B18%21%2B21%21.------------------------------------------------%2A%2F%23include+void+wwjt%28%29%3B+float+sum%28int+n%29%7B%2F%2F%7Dmain)
功能:编写函数求3!+6!+9!+12!+15+18!+21!.------------------------------------------------*/ #includ功能:编写函数求3!+6!+9!+12!+15+18!+21!.------------------------------------------------*/#include void wwjt(); float sum(int n){//}main
功能:编写函数求3!+6!+9!+12!+15+18!+21!.------------------------------------------------*/ #includ
功能:编写函数求3!+6!+9!+12!+15+18!+21!.
------------------------------------------------*/
#include
void wwjt();
float sum(int n)
{
//
}
main()
{
printf("this sum=%e\n",sum(21));
wwjt();
}
void wwjt()
{
FILE *IN,*OUT;
int i;
float o;
IN=fopen("in.dat","r");
if(IN==NULL)
{
printf("Read FILE Error");
}
OUT=fopen("out.dat","w");
if(OUT==NULL)
{
printf("Write FILE Error");
}
fscanf(IN,"%d",&i);
o=sum(i);
fprintf(OUT,"%f\n",o);
fclose(IN);
fclose(OUT);
}
功能:编写函数求3!+6!+9!+12!+15+18!+21!.------------------------------------------------*/ #includ功能:编写函数求3!+6!+9!+12!+15+18!+21!.------------------------------------------------*/#include void wwjt(); float sum(int n){//}main
sum = 1;
for(i = 3; i < 16; i = i +3)
{
for($a = $i; $a = 1; $a--)
{
$sum *= $a;
}
}