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Procedural Programming Question Paper
Procedural Programming
Course:Bachelor Of Science In Mathematics And Computer Science
Institution: Moi University question papers
Exam Year:2012
1. How do you choose between while and do ... while?
2. How do you choose between while and for?
3. Is it better to use while (1) or for (;;)?
4. How do I initialize more than one variable in a for loop?
5. What happens if you create a loop that never ends?
6. What is the output of the following program?
#include <iostream>
#include <cmath>
#define int M_PI 3.142
int main() {
double x=0.;
for (int i=1, j=1; i<=10000000; ++i, j=-j) x += j/(2.0*i-1);
std::cout << M_PI/(4*x) << std::endl;
}
7.What is the output of the following program?
#include <iostream>
int main() {
int n=1;
while (1) {
for(int m=1; m<n; m++)
std::cout << m*n << ' ';
std::cout << std::endl;
if (n++>4) break;
}
}
8.Rewrite the following for loop using while loop.
for (int x = 0; x < 10; x += 2)
cout << '&';
9. What is the value of x when the for loop completes?
for (int x = 0; x < 100; x++)
10. What is the value of x when the do ... while loop completes?
int x = 10, k;
do{
k = ++x;
x -= 2;
cout<<x<<" ";
}while(k>0);
11.What is the value of t when the for loops complete?
t = 0;
for (a=1; a<=5; a+=1)
for (b=1; b<=a; b+=2)
t += a + b;
cout<<t;
12.Write a nested for loop that outputs the following 4-by-10 pattern of 0s:
0000000000
0000000000
0000000000
0000000000
13.Write a program that inputs a positive integer number n and outputs the odd numbers between 1 and n.
For example, for n = 12, program should output:1 3 5 7 9 11
14.After each bounce of a ball the height of the ball is half that of its previous height.
Write a program to evaluate the height of the ball after 10 bounces, if the initial height is 4 m.
15. Write a program that evaluates first 30 terms the following series:
1 + 1/2 + 1/4 + 1/8 + 1/16 + 1/32 + ...
What is the result after one million terms?
16. Write a program to evaluate the first 20 terms of the following infinite series:
5/6 + 13/36 + 35/216 + 97/1296 + ...
This is a convergent series. Find the convergent value of the series analytically and compare your computer result with this value.
17. Write a program that reads a positive integer, k, and outputs its proper divisors.
For example, for k = 28, the proper divisors are 1 2 4 7 14 28
18. A perfect number, p, is a positive integer number whose sum of divisors excluding p itself equal to p.
For example, p = 6 is a perfect number since 6 = 1 + 2 + 3.
Write a program to list and count all perfect numbers less than 10,000.
19. Write a program that reads a positive integer number m and then prints the english name of each digit of that number in a single line.
For example, for m = 147, program should output:one four seven
20.A positive integer n > 1 is called a prime number if it has only two positive divisors (1 and n). The first few primes are:
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, ...
Write a program to list and count all prime numbers less than 10,000.
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