Question:12
Write a function in C named “copy_file()” to take input for source and target file name. further copy the contents.
#include<stdio.h>
#include<conio.h>
void copy_file()
{
FILE *fp,*fp1;
char sfile[10],tfile[10];
char ch;
clrscr();
printf("Enter the source file name ");
scanf("%s",sfile);
printf("Enter the target file name ");
scanf("%s",tfile);
fp=fopen(sfile,"r");
fp1=fopen(tfile,"w");
while((ch=getc(fp))!=EOF)
{
putc(ch,fp1);
}
fclose(fp);
fclose(fp1);
printf("The contents of the file %s are \n",sfile);
fp=fopen(sfile,"r");
while((ch=getc(fp))!=EOF)
{
printf("%c",ch);
}
fclose(fp);
printf("The contents of copied file %s are \n",tfile);
fp=fopen(tfile,"r");
while((ch=getc(fp))!=EOF)
{
printf("%c",ch);
}
fclose(fp);
}
int main()
{
copy_file ();
return(0);
}
Question:13
Write a function in C named “transfer()” to read the contents of a file and further transfer
all alphabets to a file named: alpha
all upper case to a file named: upper
all lower case to a file named: lower
all digits to a file named: digit
#include<stdio.h>
#include<conio.h>
#include<ctype.h>
void transfer()
{
FILE *fp1,*fp2,*fp3,*fp4,*fp5;
char ch,source[15];
printf("Enter source file name ");
scanf("%s",source);
fp1=fopen(source,"r");
fp2=fopen("alpha","w");
fp3=fopen("lower","w");
fp4=fopen("upper","w");
fp5=fopen("digit","w");
while((ch=getc(fp1))!=EOF)
{
if (isalpha(ch))
putc(ch,fp2);
if (islower(ch))
putc(ch,fp3);
if (isupper(ch))
putc(ch,fp4);
if (isdigit(ch))
putc(ch,fp5);
}
fclose(fp1);
fclose(fp2);
fclose(fp3);
fclose(fp4);
fclose(fp5);
printf("\nThe contents of the file data\n");
fp1=fopen("data","r");
while((ch=getc(fp1))!=EOF)
{
printf("%c",ch);
}
fclose(fp1);
printf("\nThe contents of the file alpha\n");
fp1=fopen("alpha","r");
while((ch=getc(fp1))!=EOF)
{
printf("%c",ch);
}
fclose(fp1);
printf("\nThe contents of the file lower\n");
fp1=fopen("lower","r");
while((ch=getc(fp1))!=EOF)
{
printf("%c",ch);
}
fclose(fp1);
printf("\nThe contents of the file upper\n");
fp1=fopen("upper","r");
while((ch=getc(fp1))!=EOF)
{
printf("%c",ch);
}
fclose(fp1);
printf("\nThe contents of the file digit\n");
fp1=fopen("digit","r");
while((ch=getc(fp1))!=EOF)
{
printf("%c",ch);
}
fclose(fp1);
}
int main()
{
transfer();
return(0);
}
Question:14
Write a C program to create a file store numbers into it and further display the contents?
#include<stdio.h>
#include<conio.h>
int main()
{
FILE *fp;
int n;
fp=fopen("num.dat","w");
if(fp==NULL)
{
printf("Unable to open the file\n");
getch();
return(0);
}
while(1)//for(;;)
{
printf("Enter number to add in file,to end press 0 (zero) ");
scanf("%d",&n);
if (n==0)
break;
putw(n,fp);
}
fclose(fp);
fp=fopen("num.dat","r");
if(fp==NULL)
{
printf("Unable to open the file\n");
getch();
return(0);
}
while((n=getw(fp))!=EOF)
{
printf("%d\n",n);
}
fclose(fp);
return(0);
}
Question : 15
Write a C program to create a file store numbers into it and further:
(i).copy all even numbers to a file named “even”
(ii)copy all odd numbers to a file named “odd”
further display the contents of all the files.
#include<stdio.h>
#include<conio.h>
int main()
{
FILE *fp,*fp1,*fp2;
int n;
fp=fopen("num.dat","w");
while(1)//for(;;)
{
printf("Enter number to add in file, to end press 0 (zero) ");
scanf("%d",&n);
if (n==0)
break;
putw(n,fp);
}
fclose(fp);
fp=fopen("num.dat","r");
fp1=fopen("even","w");
fp2=fopen("odd","w");
while((n=getw(fp))!=EOF)
{
if (n%2==0)
putw(n,fp1);
else
putw(n,fp2);
}
fclose(fp);
fclose(fp1);
fclose(fp2);
printf("The contents of the file num.dat are \n");
fp=fopen("num.dat","r");
while((n=getw(fp))!=EOF)
{
printf("%d\n",n);
}
fclose(fp);
printf("The contents of the file even are \n");
fp=fopen("even","r");
while((n=getw(fp))!=EOF)
{
printf("%d\n",n);
}
fclose(fp);
printf("The contents of the file odd are \n");
fp=fopen("odd","r");
while((n=getw(fp))!=EOF)
{
printf("%d\n",n);
}
fclose(fp);
return(0);
}
