(1)
代碼文本：
#include "stdio.h"
float Fun(int n){
return 2*(1-(float)1/(n+1));
}
int main(int argc,char *argv[]){
int n;
float s;
printf("\nPlease enter N:");
scanf("%d",&n);
s=Fun(n);
printf("The result is %f\n",s);
return 0;
}
(2)
代碼文本：
#include "stdio.h"
long Fun(int g){
int a,b;
for(a=b=1;--g>=2;b+=a,a=b-a);
return b;
}
int main(int argc,char *argv[]){
int n;
long fib;
printf("Input n:");
scanf("%d",&n);
printf("n=%d\n",n);
fib=Fun(n);
printf("fib=%d\n\n",fib);
return 0;
}