C语言：计算并输出给定10个数的方差。

 1 #include<math.h>
 2 #include<stdio.h>
 3 double fun(double x[10])
 4 {
 5     double p = 0.0,f=0.0,g=0.0;
 6     for (int i = 0; i < 10; i++)
 7     {
 8         p += x[i];
 9     }
10     p = p / 10;
11     printf("%f\n", p);
12     for (int j = 0; j < 10; j++)
13     {
14         g = x[j] - p;
15         f += g*g;
16         printf("%f\n", f);
17     }
18     f = f / 10;
19     f = sqrt(f);
20     return f;
21 }
22 void main()
23 { 
24   FILE *wf;
25   double s,x[10]={95.0,89.0,76.0,65.0,88.0,72.0,85.0,81.0,90.0,56.0};
26   int i;
27   printf("\nThe original data is:\n");
28   for(i=0;i<10;i++) 
29      printf("%6.1f ",x[i]);
30   printf("\n\n ");
31   s=fun(x);
32   printf("s=%f\n\n ",s);
33 /******************************/
34   wf=fopen("out.dat","w");
35   fprintf(wf,"%f",s);
36   fclose(wf);
37 /*****************************/
38 }