C program to read integer numbers from a file named DATA and then write all odd numbers to a file named ODD and all even numbers to a file named EVEN

Program

#include<stdio.h>
#include<conio.h>
#include<process.h>

void main()
{
int a,n,i;
FILE *fp1,*fp2,*fp3;
clrscr();
fp1=fopen(“DATA”,”w”);

if(fp1==NULL)
{
printf(“File could not open!!”);
exit(0);
}

printf(“How many numbers?”);
scanf(“%d”,&n);
printf(“Enter contents of DATA file:n”);

for(i=0;i<n;++i)
{
scanf(“%d”,&a);
putw(a,fp1);
}

fclose(fp1);

fp1=fopen(“DATA”,”r”);
fp2=fopen(“ODD“,”w”);
fp3=fopen(“EVEN”,”w”);

if(fp1==NULL||fp2==NULL||fp3==NULL)
{
printf(“File could not open!!”);
exit(0);
}

while((a=getw(fp1))!=EOF)
{
if(a%2!=0)
putw(a,fp2);
else
putw(a,fp3);
}

fclose(fp1);
fclose(fp2);
fclose(fp3);

fp2=fopen(“ODD”,”r”);
fp3=fopen(“EVEN”,”r”);

if(fp2==NULL||fp3==NULL)
{
printf(“File could not open!!”);
exit(0);
}

printf(“nContents of ODD file:n”);
while((a=getw(fp2))!=EOF)
printf(“%d “,a);

printf(“nnContents of EVEN file:n”);
while((a=getw(fp3))!=EOF)
printf(“%d “,a);

fclose(fp2);
fclose(fp3);
getch();
}

Output