程序代码：

#include <stdio.h>
int age(int n)
{
    int c;
    if (n == 1) c = 10;
    else c = age(n - 1) + 2;

    return (c);
}
int main(void)
{
    printf("第五个人的年龄是%d\n", age(5));

    return 0;
}

程序代码：

#include <stdio.h>
int age(int n);
int main()
{
    printf("%d\n",age(5));
    return 0;
}
int age(int n)
{
    int c;
    if(n == 1) c = 10;
    else c= age(n-1) + 2;
    
    return c;
}