CODECARTA

#include<stdio.h>
#include<fcntl.h>
#include"string.h"



int main()
{
    
    //create a new file by named as file.txt 

    int n=creat("file.txt","w"); 
    char ch[16]="hello world how are";
    char str[20]="od -c file.txt";
   //change permission of file.txt with maximum access

    system("chmod 777 file.txt");

   //write "helloworld string in file.txt      

   write(n,ch,16);

   // to move cursor from begging to 48th position  

    lseek(n,48,SEEK_SET);
  //write "helloworld string in file.txt      

  write(n,ch,16);
    // to prompt command in command prompt
    system(str);
    return(0);
}