Count reapetation number of unique values of an array Sort according higher occurance of values

/* A program to calculate no. of uniqe values of an array
implemented logic can be useful anywhere-
where we required count no. of same rate books in a library
e.g. 250$: 3books 300$: 4books 34$: 5books
Date: 9/3/2013 10:05pm
Author: Mangilal Saraswat */

#include<stdio.h>
#include<conio.h>
void main()
{
 clrscr();
 int i,j,k,done,a[10],b[10],c[10];
 i=0; j=0; k=0; done=0;

 printf("Enter array:
");
 for(i=0;i<10;i++)
 {
  scanf("%d",&a[i]);
  c[i]=0;
 }

 for(i=0; i<10; i++)
 {
  for(j=0;j<k;j++)
  {
   if(a[i]==b[j])
   {
    b[j]=a[i];
    c[j]=c[j]+1;
    done=1;
   }
  }
  if(done==0)
  {
   b[k]=a[i];
   c[k]=c[k]+1;
   k=k+1;
  }
  done=0;
 }

 for(j=0;j<k;j++)
 {
  printf("value: %d ",b[j]);
  printf("times: %d
",c[j]);
 }
 getch();
}

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Reverse array

Q. Write a c program to accept n elements from user and reverse all elements.


Ans.

/*c program for reverse an array*/
#include<stdio.h>
#include<conio.h>
#define S 50
int main()
{
 int i,num,mid;
 float arr[S],tmp;
 printf("Ener total number of element in array : ");
 scanf("%d", &num);
 for(i=0; i<num; i++)
 {
   printf("Enter %d element : ",i+1);
   scanf("%f", &arr[i]);
 }
 mid = num/2;
 for(i=0; i<mid; i++)
 {
   /*swapping*/
   tmp = arr[i];
   arr[i]= arr[num-1-i];
   arr[num-1-i] = tmp;
 }
 printf("
-- Array in reverse order --

");
 for(i=0; i<num; i++)
    printf(" %.2f
",arr[i]);
 getch();
 return 0;
}

/************Output************/

Screen shot for reverse array C program

Related program:

1. Reverse array using simple C program

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