#include <stdio.h> 

int peopleage(n)

 if(n==1)

 int age;

 {

     age=10;

     return 1;

 }

 else

 {

     age= peopleage(n-1)+2;

 }

 return age;

int main() 

{

    fifth=peopleage(5);

printf("第5个人的年龄是%d岁", fifth);

return 0;

}