CLASS XII COMPUTER SCIENCE BY SUMITA ARORA-QUESTION&ANSWERS

Tuesday 9 July 2013 | Unknown at 22:11 |

                                         C++ REVISION TOUR

Q. Write a C++ function having two value parameters X and N with result type float to find the sum of series given below:

1+X¹/2!+X²/3!+………+X^N/(N+1)!

Answer: 

float series(float X, int N)

{

   float sum=0, term;

   sum+=1;

   int fact, f;

for(int i=1; i<=N; i++)

 {

   fact=1;

   for(f=1; f<=(i+1); f++)

   fact*=f;

   term=pow(X, i)/fact;

   sum+=term;

  }

   return sum;

}

Q. Write a C++ function having two value parameters U and n with result type float to find the sum of series given below:

1-U+U²/2!-U³/3!+U⁴/4!..........(+/-)Uⁿ/n!

Answer:

float series (float U, int n)

{

  float sum=0, sign=+1, term=0;

  sum+=1;

  int I, j, fact;

            for (i=1; i<=n; i++)

  {

  sign*=-1;

  fact=1;

            for(j=1; j<=I; j++)

  fact*=j;

  term =(sign*pow(U, i)/fact;

  sum+=term;

   }

   return sum;

}