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#include"stdio.h"
#include"stdlib.h"
void main()
{
  char ch,str[20],filename[10];FILE *fp;
  int i=0;
  printf("enter the file name:\n");
  scanf("%s",filename);
  if((fp=fopen(filename,"w"))==NULL)
  {
    printf("cannot open the file\n");
    exit(0);
  }
  ch=getchar();

  printf("please enter a sentence:\n");
  scanf("%s\n",str);
  while(str[i]!='!')
  {
  if('a' <str[i]&&str[i] <'z')  str[i]=str[i]-32;
  fputc(str[i],fp);
  putchar(str[i]);
  i++;
  }
fclose(fp);
}

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#include <conio.h>
#include <stdio.h>
int main()
{
int i;
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ar crv liblog.a log.o
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