Question

c语言 计算1！+3！+5！+7！+9!，并输出结果

其中：阶乘计算以调用函数int f (int n)实现），源程序存入test1.c。

Answer 1

#include<stdio.h>

int f(int n)
{
int t = 1;
for(int i = 1; i <= 9; i += 2)
{
t *= i;

}
return t;
}

void main()
{
int t = 1;
int sum = 0;
for(int i = 1; i <= 9; i += 2)
{
sum += f(i);
}
printf("sum=%d\n",sum);
}

Answer 2

main()
{
int i,sum=0;
for(i=1;i<=9;i=i+2)
sum=sum+f(n);
printf("%d",sum);
}
int f(int n)
{
int j,sn=1;
for(j=1;j<=n;j++)
sn=sn*j;
return(sn);
}

Answer 3

#include<stdio.h>
int f(int n){
int s=1;
for(int i=1;i<=n;i++)s=s*i;
retrun s;
}
void main(){
int sum=0;
for(int i=1;i<=9;i+=2)sum=sum+f(i);
printf("%d\n",sum);
}

Answer 4

#include "iostream"
using namespace std;
int f(int n)
{
int i,c=1;
for (i=n;i>1;--i)
c*=i;
return c;
}

int main()
{
int i,sum=0;
for(i=1;i<=9;i+=2)
sum+=f(i);
printf("%d",sum);
return 0;
}

Answer 5

good'