Write a C program to create a file name DATA which will takes some integers from the terminal and read data from DATA file and will display odd numbers in ODD file and even numbers in EVEN file.

Answer:

#include<stdio.h>

#include<conio.h>

void main()

{

    FILE *f1,*f2,*f3;

    int number,i,a;

    clrscr();

    printf("Contents of what data: ");

    scanf("%d",&a);

    printf("\nContents of DATA file: ");

    f1 = fopen("DATA","w");

    for(i=1;i<=a;i++)

    {

            scanf("%d",&number);

            if(number==-1)break;

            putw(number,f1);

    }

    fclose(f1);

    f1 = fopen("DATA","r");

    f2 = fopen("ODD","w");

    f3 = fopen("EVEN","w");

    while((number = getw(f1)) != EOF)

    {

            if(number%2==0)

                putw(number,f3);

            else

                putw(number,f2);

    }

    fclose(f1);

    fclose(f2);

    fclose(f3);

    f2 = fopen("ODD","r");

    f3 = fopen("EVEN","r");

    printf("\nContents of ODD file: \n");

    while((number = getw(f2)) != EOF)

  printf("%4d",number);

    printf("\nContents of EVEN file: \n");

    while((number = getw(f3)) != EOF)

  printf("%4d",number);

    fclose(f2);

    fclose(f3);

    getch();

}

Simple Output:

Contents of what data: 5

Contents of DATA file: 1 2 3 4 5

Contents of ODD file:

            1          3          5

Contents of EVEN file:

            2          4