#include"iostream.h"
int ab(int );
main()
{   int i;
    cout<<"di 5 ge ren age:"<<ab(1)<<endl;
    cout<<"di 4 ge ren age:"<<ab(2)<<endl;
    cout<<"di 3 ge ren age:"<<ab(3)<<endl;
    cout<<"di 2 ge ren age:"<<ab(4)<<endl;
    cout<<"di 1 ge ren age:"<<ab(5)<<endl;
    return 0;
}
int ab(int i)
{   
    int age;
    if(i==1)
    age=10;
    else
    age=ab(i-1)+2;
    return age;
}

# include<stdio.h>
int digui(int n);
main()
{   
     int zhi;

      zhi=digui(5);
      printf("%d",zhi);

}

int digui(int n)
{
    int f;
    if (n==1)
       f=10;
    else
       f=digui(n-1)+2;
   return(f);
 }

我在turbo c中能运行等于18
希望对你有帮助

小弟我也露一手：
main()
{
 int i,j=10;
for(i=1;i<5;i++)
   j=j+2;
printf("the age of firth man is %d",j);
}

age(int n)
{
int c;
if(n==1)  c=10;
else c=age(n-1)+2;
return(c);
}
main()
{
printf("%d",age(5));
}