[C++知识库]c语言练习第三套

#include  <stdlib.h>
#include  <stdio.h>
#define   N   10
double fun(double  x[],double  *av)
{ int  i,j;    double  d,s;
  s=0;
  for(i=0; i<N; i++)  s = s +x[i];
  *av=s/N;
  d=32767;
  for(i=0; i<N; i++)
    if(x[i]<*av && *av - x[i]<=d){
      d=*av-x[i]; 
	  j=i;
	 }
  return  x[j];
}
void main()
{ int  i;    double  x[N],av,m;
  for(i=0; i<N; i++){ x[i]=rand()%50; printf("%4.0f ",x[i]);}
  printf("\n");
  m=fun(x,&av);
  printf("\nThe average is: %f\n",av);
  printf("m=%5.1f ",m);
  printf("\n");
}
#include  <stdlib.h>
#include  <conio.h>
#include  <stdio.h>
float fun(int n)
{ float A=1;int i;
  for(i=2;i<=n;i++)
     A=1.0/(1+A);
  return A;
}
void main()
{ int n;
  system("CLS");
  printf("\nPlease enter n: ");
  scanf("%d",&n);
  printf("A%d=%lf\n",n,fun(n));
}