编辑代码

#include <stdio.h>
int main () {
    int sum(int n);
    int m,n;
    scanf("%d",&n);
    m=sum(n);
    printf("%d\n",m);
}
int sum(int n)
{
    int s=0,i=1;
    for(i=1;i<=n;i=i+2)
    s=s+i*i;
    return s;
}