帮我看看程序吧,从键盘输入任意一个整数n,编程计算并输出1～n之间所有素数之和 ,怎么改啊
#include
#include
int prime(int i,int n );
int main()
{
int sum = 0;
int ret;
int b;
int i = 0;
int n;
printf("Please input a number");
scanf("%d",&n);
ret = prime (i,n);
for (i = 3;i