Odd Even Check From a File
In this program we are going to read a stream of numbers from a text file and then append the odd number in odd file and even number into the even file as in the following example.
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Example :
#include<iostream.h>
#include<conio.h>
#include<fstream.h>
#include<stdio.h>
#include<stdlib.h>
#include<ctype.h>
void main()
{
clrscr();
ifstream fs;
ofstream fodd,feven;
int i=0,j=0;
//To accept file name from user declaration of string characters
char ch, fname[20],even[20],odd[20];
printf("Enter source file name with extension (like files.txt) : ");
//gets() function to accept file name
gets(fname);
//Open the file fname in read mode
fs.open(fname,ios::in);
//if file fails to open
if(!fs)
{
printf("Error in opening source file..!!");
getch();
exit(1);
}
//Accepting odd dile and even file names
printf("Enter odd number file name with extension (like filet.txt) : ");
gets(odd);
//Opening file in append mode
fodd.open(odd,ios::app);
printf("Enter even number file name with extension (like filet.txt) : ");
gets(even);
feven.open(even,ios::app);
//if even or odd file fails to open
if(!fodd || !feven)
{
printf("Error in opening target file..!!");
fs.close();
getch();
exit(2);
}
//While the end of the stream
while(fs.eof()==0)
{
j=0;
//read integer value from the file
fs>>i;
j=i;
i=0;
//if even append in even file
if(j%2==0)
{
feven<<j;
}
//else append in odd file
else
fodd<<j;
}
printf("\nOperation successful");
fs.close();
feven.close();
fodd.close();
getch();
} |
Output :
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