Question

一道c语言编程题，求代码，谢谢

Answer 1

//计算结果为：9!+8!+7!+6!+5!+4!+3!+2!+1 = 409 113
//下面的代码经过验证，希望对你有帮助。
int main(int argc, char* argv[])
{
int i,j,sum,factorial;
sum=0;
for(i=1;i<10;i++)
{
factorial=1;
for(j=1;j<=i;j++)
{
factorial =factorial*j;

}
sum +=factorial;
printf("sum +=%d!=%d\r\n",j-1,sum);
}
printf("sum=%d\r\n",sum);
printf("Hello World!\n");
return 0;
}

Answer 2

#include <stdio.h>

int jiecheng(int n)
{
if(n==1)return 1;
else
return n*jiecheng(n-1);
}
int main()
{
int sum=0;
for(int i=1; i<10; i+=2)
sum+=jiecheng(i);
printf("%d\n",sum);
}

追答

欢迎追问，满意采纳！

Answer 3

int main()
{
int count = 0;
int t = 1;
int i;
for(i = 1;i < 10;i ++)
{
t *= i;
if(i %2 != 0)
{
count = count + t;
}
}
printf("%d\n",count);
}