Write a function named integerPower() that accepts two integer numbers (base and exponent) as
formal parameters and returns the value of base exponent. For example, integerPower(3,4) = 3 * 3 *
3 * 3 = 81
Answer: #include <iostream>
using namespace std;
int integerPower(int base, int expo)
{
int answer=1;
for(int i=1;i<=expo;i++)
answer*=base;
cout<<endl<<endl;
cout<<base<<\" base , exponent \"<<expo;
cout<<\"ANSWER is: \"<<answer<<endl;
return answer;
}
int main()
{
int mainBase,mainExpo;
cout<<\"Enter the base and exponent: \"<<endl;
cin>>mainBase>>mainExpo;
integerPower(mainBase,mainExpo);
return 0;
}
2.
Change the program so that the pay amount is displayed in the main program instead of function
calculatePay. Submit a printout of the program and the output
Answer: #include <iostream>
using namespace std;
void printHeading()
{
for(int i=1;i<=52;i++)//using a for loop to output a number of (*)s
cout<<\"*\";
cout<<endl;
cout<<\" GOLDEN SALES COMPANY\"<<endl;
cout<<\"This program inputs the number of items sold by a \"<<endl;
cout<<\" Salesperson and prints the amount of pay due\"<<endl;
for(int n=1;n<=52;n++)//using a for loop to output a number of (*)s
cout<<\"*\";
cout<<endl;
}
float calculatePay(float x)//a function to return a calculation as a float
{
x*=12.5;
cout.setf(ios::fixed);
cout.precision(2);
cout<<endl;
return x;
}
int main()
{
int items;
printHeading();
cout<<\"please input the number of items sold: \"<<endl;
cin>>items;
cout<<\"The amount pay due is R\"<<calculatePay(items)<<endl;
return 0;
}
3.
In this program, you have to make use of the switch statement. The average life expectancy (in
hours) of a lightbulb based on the bulb’s wattage is listed in the table below
Answer: #include <iostream>
using namespace std;
int main()
{
int watts,
life;
cout<<\"Enter the watts of a bulb: \";
cin>>watts;
switch(watts)
{
case 25:
life=25000;
break;
case 40:
case 60:
life=1000;
break;
case 75:
case 100:
life=750;
break;
}
if(watts==25||watts==40||watts==60||watts==75||watts==100)
cout<<\"The life expectancy of a light bulb with \"<<watts<<\" watts is \"<<life<<\" hours.\"<<endl;
else
cout<<\"the life expectancy in hours is not defined in the range for the watts entered.\"<<endl;
return 0;
}
4.
Four experiments are performed, each consisting of five test results. The results for each experiment
are given in the following list. Write a program using a nested loop to compute and display the
average of the test results for each experiment. Display the average with a precision of two digits
after the decimal point.
Answer: #include <iostream>
using namespace std;
int main()
{
float result, total, average;
for (int e=1;e<=4;e++)
{
total=0;
average=0;
cout<<\"EXPERIMENT NO.\"<<e<<endl;
for (int i=1;i<=5;i++)
{
cout<<\"ENTER THE RESULTS: \";
cin>>result;
total+=result;
}
average=total/5.0;
cout<<\"The average for experiment no.\"<<e<<\" is \"<<average<<endl<<endl;
}
return 0;
}
5.
The cost of renting a romm at a hotel is R900 per night. For special occasions, such as a wedding or
conference, the hotel offers a special discount as follows: • if the number of rooms booked is at least
10, the discount is 10%; • if the number of rooms booked is at least 20, the discount is 20%; • if the
number of rooms booked is greater or equal 30, the discount is 30%;
Answer: #include <iostream>
using namespace std;
int main ()
{
float discount, price, rooms, days, total, salesTax, discountTotal, taxedTotal;
cout<<\"Please enter the following: \"<<endl;
cout<<\" cost per room: \";
cin>>price;
cout<<\" Sales tax per room: \";
cin>>salesTax;
cout<<\" the number of rooms: \";
cin>>rooms;
cout<<\" number of days: \";
cin>>days;
cout<<endl<<endl;
cout<<\"The total cost for one room is R\"<<price<<endl;
if (10<=rooms && rooms<20) //testing the number of rooms booked and assigning a value to
discount.
discount=10;
else
if (20<=rooms && rooms<30)
discount=20;
else
discount=30;
if (days>=3) //testing the days and incriminating discount with five if days are 3 or greater.
discount+=5;
cout<<\"The discount per room is \"<<discount<<\"%\"<<endl;
cout<<\"The number of rooms booked: \"<<rooms<<endl;
//calculating the total price of the booking.
total=price*rooms*days;
//subtracting the discount from the total accordingly.
discountTotal=total-total*(discount/100);
cout<<\"The total cost of the rooms over \"<<days<<\" days is R\"<<discountTotal<<endl;
cout<<\"The sales tax paid is: \"<<salesTax<<\"%\"<<endl;
//adding sales tax to the total discounted price.
taxedTotal=discountTotal+discountTotal*(salesTax/100);
cout<<\"The total cost per booking is R\"<<taxedTotal<<endl;
return 0;
}
QUESTION 1b.
CODE OUTPUT
a. for(int i=1;i<=1;i++) *
cout<<”*”;
cout<<endl;
b. for(int i=2;i>=2;i++) Endless loop of *
cout<<”*”;
cout<<endl;
c. for(int i=1;i<=1;i--) Endless loop of *
cout<<”*”;
cout<<endl;
d. for(int i=12;i>=9;1--) ****
cout<<”*”;
cout<<endl;
e. for(int i=0;i<=5;i++) ******
cout<<”*”;
cout<<endl;
f. for(int i=1;i<=5;i++) Syntax error.
cout<<”*”; “i” is inaccessible after the for loop.
i=i+1;
cout<<endl;
QUESTION 1c.
,PROGRAM.
#include <iostream>
using namespace std;
int main()
{
int i=0;
while(i<=10)
{
if (i<5 && i!=2)
cout<<"X";
i++;
}
return 0;
}
Output.
QUESTION 1d.
, PROGRAM.
#include <iostream>
using namespace std;
const int LIMIT =10;
int main()
{
float counter;
//The declaration of variables can be on the same line separated by a comma.
int number, zeros, odds, evens;
//The counter variables are inirialised to assure that they don’t acquire an unknown initial value.
zeros=0;
odds=0;
evens=0;
cout<<"Please enter "<<LIMIT<<" integers, positive,negative or zeros."<<endl;
cout<<"The number you entered are "<<endl;
for(counter=1;counter<=LIMIT; counter++)
{
cin>>number;
switch(number%2) //The switch statement is working on a remainder and (%) is used.
{
case 0:
evens++;
if (number==0) //correcting the boolean operator for number is equal to zero…(==) not (=)
zeros++;
break;
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