Question

C语言编写程序,求出1+1*3+1*3*5+1*3*5*7+1*3*5*7*9=?

急，在线等~~~~~~~~

Answer 1

#include <stdio.h>
int function(int n)
{
int m;
if(n==1)
return 1;
m=n*function(n-2);
return m;
}
int main()
{
int n,k;
scanf("%d",&n);
if(n<1||(n%2==0)){
printf("input wrong\n");
return 0;
}
k=function(n);
printf("%d\n",k);
return 0;
}

Answer 2

int total=0,j=1, i;
for(i=1;i<10;i=i+2)
{
j=j*i;
total=total+j;
}
printf("%d",total);