File I/O

  #include<stdio.h>
  main()
  {
    char a[ ]="CCIT\nRajapeth\nAmravati";
    FILE *fp;
    fp=fopen("c:\\temp\\info.txt","w");
    if(fp==NULL)
  	    printf("Cannot Open File");
    else
  	{
  		fputs(a,fp);
  		fclose(fp);
  		printf("Data stored..");
	}
  }

  #include<stdio.h>
  main()
  {
    char arr[100];
    int i=1;
    FILE *fp;
    fp=fopen("c:\\temp\\info.txt","r");
    if(fp==NULL)
  	    printf("Cannot Open File");
    else
  	{
  	    while(fgets(arr,100,fp)!=NULL)
	    {
	  	    printf("%d %s",i,arr)	;
	  	    i++;
	    }
	    fclose(fp);
	}
  }

  #include<stdio.h>
  main()
  {
    FILE *fp;
    char  name[100];
    int rollno,age;
    printf("Enter the Rollno,age,name => \n");
    scanf("%d %d %s",&rollno,&age,name);
    fp=fopen("stud.txt","a");
    if(fp==NULL)
        printf("File dos'nt exists...");
    else
    { 
        fprintf(fp,"%d %d %s",rollno,age,name);
        fclosel(fp);
    }
  }

  #include<stdio.h>
  main()
  {
    FILE *fp;
    n[100];
    int rollno,age;
    =fopen("stud.txt","r");
    if(fp==NULL)
        printf("File dos'nt exists...");
    else
    {
        while(fscanf(fp,"%d %d %s",&rollno,&age,n)==3)
            printf("RollNo %d  Age %d  Name %s\n",rollno,age,n);
        fclose(fp);
    }
  }