What are the different functions used for file handing? Write a C program to create a file contains a series of integer numbers and then reads all numbers of this file and writes all odd numbers to other file called odd and writes all even numbers to a file called.

Some functions are used for file handling in C Language

• fopen()
• fprintf()
• fscanf()
• fclose()
• fcloseall()
• fgetch()
• fputch()
• fgets()
• fread()
• fwrite()
• fseekp()
• fseekg()
• ftell()

Now, Algorithm of the programe

Step 1: Open a file pointer in write mode for craete a file of series of numbers (numbers.txt).

Step 2: read the numbers from keyboard and put into numbers.txt. press 0 to stop the series.

Step 3: Closed the said file pointer.

Step 4: Open the same file again but in read mode.

Step 5: Open another two file (odd.txt) and (even.txt) in write mode.

Step 6: Read the numbers from first file one by one and check it even or odd. If it is even the put in in even.txt otherwise put it into odd.txt

Step 7: Closed all file pointers using fcloseall() function.

#include<stdio.h>

void main()
{
	FILE *num,*odd,*even;
	int n=-1;
	num=fopen("numbers.txt","w");
	while(n!=0)
	{
		printf("Enter A Number (0 [Zero] to stop): ");
		scanf("%d",&n);
		if(n==0){break;}
		fprintf(num,"%d \n",n);
	}
	fclose(num);
	num=fopen("numbers.txt","r");
	odd=fopen("odd.txt","w");
	even=fopen("even.txt","w");
	while(fscanf(num,"%d",&n)!=EOF)
	{
		if(n%2==0)
		{
			fprintf(even,"%d\n",n);
		}
		else
		{
			fprintf(odd,"%d\n",n);
		}
	}
	fcloseall();
}

Data of number files (numbers.txt)

1
2
3
4
5
6
7
8
9
10
25
29
34
65
88
93

Data of odd files (odd.txt)

1
3
5
7
9
25
29
65
93

Data of odd files (even.txt)

2
4
6
8
10
34
88