C Program to create two files to store even and odd numbers

ALGORITHM :

Step 1: Start
Step 2: Create two empty files named "even_numbers.txt" and "odd_numbers.txt".
Step 3: Open the even_numbers.txt file in write mode as even_file.
Step 4: Open the odd_numbers.txt file in write mode as odd_file.
Step 5: Iterate through numbers from 1 to 100.
Step 6: If the number is even, write it to even_file followed by a newline character.
Step 7: If the number is odd, write it to odd_file followed by a newline character.
Step 8: Close both files after the loop ends.
Step 9: End

SOURCE CODE :

#include <stdio.h>

int main() {

FILE *evenFile, *oddFile;

evenFile = fopen("even.txt", "w");

oddFile = fopen("odd.txt", "w");

if (evenFile == NULL || oddFile == NULL) {

printf("Error opening the files.\n");

return 1;

}

int num;

char choice = 'y';

while (choice == 'y') {

printf("Enter a number: ");

scanf("%d", &num);

if (num % 2 == 0)

fprintf(evenFile, "%d\n", num);

else

fprintf(oddFile, "%d\n", num);

printf("Do you want to enter more numbers? (y/n): ");

getchar(); // To consume the newline character from the previous input

scanf("%c", &choice);

}

fclose(evenFile);

fclose(oddFile);

return 0;

}

OUTPUT :

Before Execution do this :

Files "even.txt" and "odd.txt" will be created with the respective numbers.

Enter a number: 12