p2.c

the names of the users input will be displayed alphabetically,

/*
  WAPto enter the name of ten student and roll number and then arrange
  them alphabatically and then by roll no and print the name of the
  student whose position is same after sorting*/
#include<stdio.h>
#include<conio.h>
#include<string.h>
void main()
{
 int a,i,j;
 char n[10][50],c[10][50],t[50];
 long nr[10],tr,cr[10];
 clrscr();
 printf("how many number of students you want to enter: ");
 scanf("%d",&a);
 for(i=0;i<a;i++)
 {
  printf("Enter the %d name: ",i+1);
  fflush(stdin);
  gets(n[i]);
  printf("Enter the Roll No:");
  scanf("%ld",&nr[i]);
 }
 printf("\n\nName\t\tRoll number");
 for(i=0;i<a;i++)
 {
  printf("\n%s\t\t%ld",n[i],nr[i]);
 }
 for(j=0;j<a;j++)
 {
  strcpy(t,n[j]);
  for(i=j+1;i<a;i++)
  {
   if(strcmp(t,n[i])>0)
   {
	strcpy(t,n[i]);
	tr=nr[i];
	strcpy(n[i],n[j]);
	nr[i]=nr[j];
	strcpy(n[j],t);
	nr[j]=tr;
   }
  }
 }
 printf("\nNames after sorting alphabatically");
 printf("\n\nName\t\tRoll number");
 for(i=0;i<a;i++)
 {
  printf("\n%s\t\t%ld",n[i],nr[i]);
 }
 getch();
 for(i=0;i<a;i++)
 {
  cr[i]=nr[i];
  strcpy(c[i],n[i]);
 }
 for(i=0;i<a;i++)
 {
  tr=cr[i];
  for(j=i+1;j<a;j++)
  {
   if(tr>cr[j])
   {
    tr=cr[j];
    strcpy(t,c[j]);
    cr[j]=cr[i];
    strcpy(c[j],c[i]);
    cr[i]=tr;
    strcpy(c[i],t);
   }
  }
 }
 printf("\n Name after sorting by roll numbers");
 printf("\n\nName\t\tRoll number");
 for(i=0;i<a;i++)
 {
  printf("\n%s\t\t%ld",c[i],cr[i]);
 }
 getch();
 printf("\n\nName\t\tRoll number");
 i=0;
 for(i=0;i<a;i++)
 {
  if(strcmp(c[i],n[i])==0)
  printf("\n%s\t\t%ld",n[i],cr[i]);
 }
 getch();
}