函数调用函数

Question

#include <stdio.h>

void two()

{

    printf("two");

}

void one_three()

{

    printf("one\n");

    two();

    printf("\nthree\n");

}

int main(void) 

{ 

printf("Start:\n");

one_three;

printf("done!\n");

return 0;

}

显示不了one，two，three

Answer 1

one_three()