Programming Fundamentals:Functions& Pointers (Session 6)

Distance between 2  points.

#include<stdio.h>
#include<math.h>
float findDistance (int x1, int y1, int x2, int y2)
{
  return sqrt( ( (x2-x1)*(x2-x1) )+( (y2-y1)*(y2-y1) ) );
}
int main()
{
  int x1,y1,x2,y2;
  scanf("%d %d %d %d",&x1,&y1,&x2,&y2);
  printf("Distance between the 2 points is %.2f",findDistance(x1,y1,x2,y2));
  return 0;
}

Factorial

#include<stdio.h>
int factorial (int n)
{
  if(n>1)
    return n*factorial(n-1);
  else
  return 1;
}
int main()
{
  int x;
  scanf("%d",&x);
  printf("%d",factorial(x));
  return 0;
}
Lucky string

#include<stdio.h>

int checkLucky(char *a)

{

  int sum=0;

  while(*a!='\0')

  {

    sum+=(int)(*a);

    ++a;

  }

  if(sum%2==0)

    return 1;

  else

    return 0;

}

int main()

{

  printf("Enter the input string\n");

  char str[100];

  scanf("%s",str);

  int a=checkLucky(str);

  if(a)

    printf("%s is lucky",str);

  else

    printf("%s is not lucky",str);

  return 0;

}

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