题目中的调用函数jackResult (a,b,c)可不可以放在printf的前面？若不行，为什么?
#include <stdio.h>
int joneResult(int x, int y, int z)
{
int sum = x+y+z;
return sum/3;
}
void jackResult(int x, int y, int z)
{
printf("我算不出来\n");
}
int main()
{
int a, b, c;
a = 10;
b = 20;
c = 30;
int jR = joneResult(a, b, c);
printf("Jone运算结果是：%d\n", jR);
printf("Jack运算结果是：");
jackResult(a,b,c);
return 0;
}
