#include <stdio.h>
int joneResult(int x, int y, int z)
{
?? int sum = (x+y+z)/3;
?? return 0;
}

?void jackResult(int x, int y, int z)
{
??? printf("我算不出來\n");
}
int main()
{
??? int a, b, c,jr;
??? a = 10;
??? b = 20;
??? c = 30;
??? jr = joneResult(a, b, c);
??? printf("Jone運算結(jié)果是：%d\n",jr );
??? printf("Jack運算結(jié)果是：");
??? jackResult(a,b,c);
??? return 0;
}