计算机二级-C语言-对标志位的巧妙使用。对二维数组数据进行处理。对文件进行数据输入。

 1 #include  <stdlib.h>
 2 #include  <stdio.h>
 3 #define   N   10
 4 double fun(double  *x)
 5 { int  i, j;    double  s, av, y[N];
 6   s=0;
 7   for(i=0; i<N; i++)  s=s+x[i];
 8 /**********found**********/
 9   av = s / N;
10   for(i=j=0; i<N; i++)
11     if( x[i]>av ){
12 /**********found**********/
13       y[j++]=x[i];
14       x[i]=-1;}
15   for(i=0; i<N; i++)
16 /**********found**********/
17     if( x[i]!= -1) y[j++]=x[i];
18   for(i=0; i<N; i++)x[i] = y[i];
19   return  av;
20 }
21 void main()
22 { int  i;     double  x[N];
23   for(i=0; i<N; i++){ x[i]=rand()%50; printf("%4.0f ",x[i]);}
24   printf("\n");
25   printf("\nThe average is: %f\n",fun(x));
26   printf("\nThe result :\n",fun(x));
27   for(i=0; i<N; i++)  printf("%5.0f ",x[i]);
28   printf("\n");
29 }

 1 #include  <stdlib.h>
 2 #include  <string.h>
 3 #include  <conio.h>
 4 #include  <ctype.h>
 5 #include  <stdio.h>
 6 #include  <string.h>
 7 /*************found**************/
 8 void upfst(char *p)
 9 {
10   int k=0;//通过k标志位进行判断时候为一个单词了。
11   for ( ;*p;p++)
12      if (k)
13         {
14          if (*p==‘ ‘)  
15              k=0;
16         }
17      else
18         {
19             if (*p!=‘ ‘)  
20             {
21                 k=1;
22                 *p=toupper(*p);
23             }
24         }
25 }
26 void main()
27 {
28     char  chrstr[81];
29     system("CLS");    
30     printf("\nPlease enter an English text line: ");
31     gets(chrstr);
32     printf("\nBofore changing:\n  %s",chrstr);
33     upfst(chrstr);
34     printf("\nAfter changing:\n  %s\n",chrstr);
35 }

 1 #include<stdio.h>
 2 #include<conio.h>
 3 #include<stdlib.h>
 4 #define  N  5
 5 double fun (int w[][N])
 6 {
 7     int i, j;
 8     double s = 0;
 9     for (i = 0; i < N; i++)
10     {
11         if(i==0||i==(N-1))
12         {
13             for (j = 0; j < N; j++)
14             {
15                 s += w[i][j];
16             }
17         }
18         else
19         {
20             s = s + w[i][0] + w[i][N-1];
21         }
22     }
23     return (s / (4 * (double)N - 4));
24 }
25 void main()
26 {
27   FILE *wf;
28   int a[N][N]={0,1,2,7,9,1,9,7,4,5,2,3,8,3,1,4,5,6,8,2,5,9,1,4,1};
29   int i, j;
30   double s;
31   system("CLS");
32   printf("*****The array*****\n ");
33   for (i=0; i<N; i++)
34     { for (j=0;j<N;j++)
35          {printf("%4d ",a[i][j]);}
36       printf("\n ");
37     }
38   s=fun(a);
39   printf("*****THE RESULT*****\n ");
40   printf("The sum is : %lf\n ",s);
41 /******************************/
42   wf=fopen("out.dat","w");
43   fprintf (wf,"%lf",s);
44   fclose(wf);
45 /*****************************/
46 }