Basic C Programs (Part 4)

16.Eleminate repeated elements in Array:

#include<stdio.h>
int main(){
    int a[15],i,j,k,size;
    printf("enter array size to input\n");
    scanf("%d",&size);
    printf("Enter numbers\n");
    for(i=0;i<size;i++)
    scanf("%d",&a[i]);

    for(i=0;i<size;i++)
    {
        for(j=i+1;j<size;)
        {

            if(a[j]==a[i])
            {
                for(k=j;k<size;k++)
                {
                    a[k]=a[k+1];
                }size--;
            }else
            j++;
        }
    }
    for(i=0;i<size;i++)
    {
        printf("%d",a[i]);
    }
    return(0);
}

17.Printing range of prime numbers:

#include <stdio.h>
int main()
{
   int n1, n2, flag, i, j;
   printf("Enter two range:");
   scanf("%d %d", &n1, &n2);
   for(i=n1+1; i<n2; ++i)
   {
      flag=0;
      for(j=2; j<=i/2; ++j)
      {
         if(i%j==0)
         {
            flag=1;
            break;
         }
      }
      if(flag==0)
         printf("%d\n",i);
  }
  return 0;
}

18. Maximum number of handshakes:

#include<stdio.h>
int main()
{
    int num;
    printf("Enter number of people");
    scanf("%d",&num);
    int max = num * (num-1) / 2; // Combination nC2
    printf("%d",max);
    return 0;
}

19. Coverting Decimal to Binary:

#include <stdio.h>
int main()
{
  int n, c, k;

  printf("Enter an integer in decimal number system\n");
  scanf("%d", &n);

  printf("%d in binary number system is:\n", n);

  for (c = 31; c >= 0; c--)
  {
    k = n >> c;

    if (k & 1)
      printf("1");
    else
      printf("0");
  }

  printf("\n");

  return 0;
}

20.Converting Decimal to Hexadecimal:

#include<stdio.h>
int main() {
	long int decNum,remainder,quotient;
	int i=1,j,temp;
	char hexdNum[100];
	printf("Enter any decimal number: ");
	scanf("%ld",&decNum);
	quotient = decNum;
	while(quotient!=0) {
		temp = quotient % 16;
		if( temp < 10)
		           temp =temp + 48;
        else
		         temp = temp + 55;
		    hexdNum[i++]= temp;
		quotient = quotient / 16;
	}
	printf("Equivalent hexadecimal value of decimal number %d: ",decNum);
	for (j = i -1 ;j> 0;j--)
	      printf("%c",hexdNum[j]);
	return 0;
}

Other Related Posts:

Basic C Programs(PART 1)

Basic C Programs(PART 2)

Basic C Programs(PART 3)

Basic C Programs(PART 5)