#include<conio.h>

 #include<stdio.h>

 #include<string.h>

 #include<stdlib.h>

 void fun(char *ss)

 {

     int i;

     for (i = ; ss[i]; i++)

     {

         if (i %  == )

         {

             if (ss[i] >= 'a'&&ss[i] <= 'z')

             {

                 ss[i] -= ;//转换成大写

             }

         }

     }

 }

 void main()

 {

   FILE *wf;

   char tt[],s[]="abc4Efg";

   system("CLS");

   printf("\nPlease enter an string within 80 characters:\n");

   gets(tt);

   printf("\n\nAfter changing, the string\n  %s",tt);

   fun(tt);

   printf("\nbecomes\n %s\n",tt);

 /******************************/

   wf=fopen("out.dat","w");

   fun(s);

   fprintf (wf,"%s",s);

   fclose(wf);

 /*****************************/

 }

 #include  <string.h>

 #include  <stdio.h>

 void fun(char  t[])

 {

  char c;

  int i,j;

  /*************found**************/

  for(i=strlen(t)-;i;i--)指向最后一个元素

      for(j=;j<i;j++)

         /*************found**************/

       if(t[j]>t[j+])

           {

            c= t[j];

            t[j]=t[j+];

            t[j+]=c;

           }

 }

 void main()

 {

  char  s[];

  printf("\nPlease  enter a character string :");

  gets(s);

  printf("\n\nBefore sorting :\n  %s",s);

  fun(s);

  printf("\nAfter sorting decendingly:\n %s",s);

 }

 #include  <stdio.h>

 #define   N   3

 #define   M   4

 /**********found**********/

 void fun(int (*a)[N], int k)

 { int i,temp ;

 /**********found**********/

   for(i =  ; i < N ; i++)

   { temp=a[][i] ;

 /**********found**********/

     a[][i] = a[k][i];

     a[k][i] = temp ;

   }

 }

 void main()

 { int x[M][N]={ {,,},{,,},{,,},{,,} },i,j;

   printf("The array before moving:\n\n");

   for(i=; i<M; i++)

   {  for(j=; j<N; j++) printf("%3d",x[i][j]);

      printf("\n\n");

   }

   fun(x,);

   printf("The array after moving:\n\n");

   for(i=; i<M; i++)

   {  for(j=; j<N; j++) printf("%3d",x[i][j]);

      printf("\n\n");

   }

 }