我这是怎么了

#include <stdio.h> 

int numPeople(n)

{

int age;

if(n==1)

{

age=10;

}

else

{

age=(n-1)+2;

}

return age;

}

int main()

{

int age=numPeople(5);

printf("第5个人的年龄是%d岁", age); 

return 0;

}