Date: Jan 10,2003 When I started developing these Programs
C plus plus Programs
Programmer : Tariq Chaudhary
Tools: Visual C++ 6.0
Write Program:
Depending of the users input your program should perfom the following
operations:
* 1:Read 10 real numbers from the keyboard and store them in an array.
* 2:Perform the following basic statistical operations on the 10
numbers entered by the user and print the results onto the screen:
o calculate the mean
o calculate the variance
o calculate the standard deviation
* 3:Leave the program.
Solution:
#include<iostream.h>
#include<math.h> //this is for sqrt()
#include<iomanip.h> //this is for setw()
const int size=10;
void bsort(int num[size]);
#include<iostream.h>
#include<math.h> //for sqrt()
const int size =10;
static int num[size];
void menuprint();
void GetData();
void doCalculation();
int i;
void main()
{
int choice;
cout<<endl;
do
{
menuprint();
cin>>choice;
cout<<endl;
switch(choice)
{ case (1): { GetData();
break;}
case (2): {doCalculation();
break;}
case (3):cout<<"Quiting the program\n";
break;
default:
if(choice!=1||2||3)
cout<<"Error:You made an incorrect choice?try again\n";
break;
}
}while(choice!=3);
cout<<endl;
}
void menuprint()
{
cout<<endl;
cout<<"Make your selection:";
cout<<endl;
cout<<endl;
cout<<"1.*** Enter Data ***\n";
cout<<"2.*** Calcualte Mean,Vaiance and Standard Deviation ***\n";
cout<<"3.*** Quit ***\n";
cout<<endl;
cout<<"Please enter your choice(1,2,3)!";
//return(0);
}
void GetData()
{
for(i=0; i<size; i++)
{
cout<<"please enter number 1:";
cin>>num[i];
++i;
cout<<"please enter number 2: ";
cin>>num[i];
++i;
cout<<"please enter number 3: ";
cin>>num[i];
++i;
cout<<"please enter number 4: ";
cin>>num[i];
++i;
cout<<"please enter number 5: ";
cin>>num[i];
++i;
cout<<"please enter number 6: ";
cin>>num[i];
++i;
cout<<"please enter number 7: ";
cin>>num[i];
++i;
cout<<"please enter number 8: ";
cin>>num[i];
++i;
cout<<"please enter number 9: ";
cin>>num[i];
++i;
cout<<"please enter number 10: ";
cin>>num[i];
++i;
}
}
void doCalculation()
{
int sum=0;
float mean;
float variance;
double stdDev;
for(i=0; i<size; i++)
sum += num[i]; //formula for calculating sum
mean = (sum)/size; //this is formula for calculating the mean
//the following formula is for calculating the variance
variance = ((num[0]-mean)*(num[0]-mean))+((num[1]-mean)*(num[1]-mean))+
((num[2]-mean)*(num[2]-mean))+((num[3]-mean)*(num[3]-mean))+
((num[4]-mean)*(num[4]-mean))+((num[5]-mean)*(num[5]-mean))+
((num[6]-mean)*(num[6]-mean))+ ((num[7]-mean)*(num[7]-mean))
+((num[8]-mean)*(num[8]-mean))+ ((num[9]-mean)*(num[9]-mean))/size-1;
//formula for standard deviation
stdDev = sqrt(variance);
cout<<endl;
cout<<" The Sum of 10 numbers is : "<<sum<<endl;
cout<<" The Mean of 10 numbers is : "<<mean<<endl;
cout<<" The Variance of 10 numbers is : "<<variance<<endl;
cout<<" The Standard deviation of 5 numbers is : "<<stdDev<<endl;
}
void bsort(int num[size])
{
int temp;
int ctr1,ctr2;
for(ctr1=0; ctr1<(size-1); ctr1++)
{ for (ctr2=(ctr1+1); ctr2<size; ctr2++)
{if(num[ctr1] > num[ctr2]) // this is for ascending order
{ temp = num[ctr1];
num[ctr1] = num [ctr2];
num[ctr2] = temp;
}
}
}
}
*****************************End of the Program**********************************************
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#include <iostream.h >
#include <math.h > // for pow()
#include<iomanip.h> //for setw()
void menuprint();
void GetData();
void GetInterest();
static int p,r,n,i,f;
<!-- //p=principle amount r=rate ,n=number of years,i =Interest,f=compound interest-->
void main()
{
int choice;
//cout<<"Programmer:Tariq,Date:Dec 09,2001 \n";
// cout<<endl;
do
{
menuprint();
cin>>choice;
cout<<"\n";
switch(choice)
{ case (1): { GetData();
break;}
case (2): {GetInterest();
break;}
case (3):cout<<" Quiting the program\n";
break;
default:
if(choice!=1||2||3)
cout<<"Error:You made an incorrect choice?try again\n";
break;
}
}while(choice!=3);
cout<<endl;
}
void menuprint()
{
cout<<endl;
cout<<" Make your selection:";
cout<<endl;
cout<<endl;
cout<<" 1.*** Enter Data ***\n";
cout<<" 2.*** Get Interest ***\n";
cout<<" 3.*** Quit *** \n";
cout<<endl;
cout<<" Please enter your choice(1,2,3)!";
}
void GetData() //get data from the user
{
cout<<" Your selection is 1 which is Get Data:\n"<<endl;
cout<<" Please enter the Principle amount?$";
cin>>p;
cout<<endl;
cout<<" Please enter interest rate:";
cin>>r;
cout<<endl;
cout<<" Please enter Loan/Investment term in years)?:";
cin>>n;
}
void GetInterest() //will calculate the interest
{
cout<<" Your selection is 2 which is to Calculate Interest"<<<<endl; cout<<setw(8)<<" Data you entered is:"<<endl;
cout<<setw(8)<<" Principle amount:$"<<p;endl;
cout<<setw(8)<<" Interest Rate :"<<r<<endl;
cout<<setw(8)<<" Term In years:"<<n<<endl;
//interest rate
//i1=r/100;
//i= p * (r/100);
i = (p* r/100 *n); //this does not work properly
//formula for compound interest
//f = p * pow((1+i),n);
cout<<" The Interest is:$"<<i;
cout<<endl;
} //end of GetInterest()
*****************************End of the Program**********************************************
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Program:
Define a structure that will store information about a given stock. Include fields for: Name of company, symbol, shares owned, purchase price, previous close price. Create an instance of the struct and input some data into all of the fields.
Solution:
#include<iostream.h>
struct stock_info //name of the structure
{
char comp_name;
char stock_symbol;
long int shares_owned;
float purchase_price;
float prev_close_price;
};
void main()
{
stock_info stock; //stock is a structure variable
stock.comp_name = 'First Investment'; //assign values to structure
stock.stock_symbol = 'FI';
stock.shares_owned = 100000;
stock.purchase_price = 45.00;
stock.prev_close_price = 38.00;
//display the information
cout<<"\n Company Name "<<stock.comp_name;
cout<<",Stock Symbol " <<stock.stock_symbol;
cout<<" ,Shares Owned " <<stock.shares_owned;
cout<<", Purchase Price "<<stock.purchase_price;
cout<<" ,Previous Close Price"<<stock.prev_close_price;
}
*****************************End of the Program**********************************************
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Program:
For this assignment you have to implement a class that models a table in a restaurant in terms of ordering. Every table (or rather the customers at the table) can order from a list of items. Every item is characterized by its name and its price. At the end the user wants to print out the bill for that particular table.
You have to decide what private data members your class needs and then the following methods have to be implemented:
default constructor
void addItem(string itemName, double price): adds an item to the tables bill.
void printBill():prints the tables bill onto the screen.
You can assume that no table will order more than 50 items. Note that the main program and the class Table have to be in different files and you will only submit the file that contains the class table.
#include<iostream.h>
#include <iomanip.h> //for setw()
//you can change value of max from 5 to 60 or any
const int MAX =5;
class table
{
private:
char item_name[12];
float item_price;
//int n;
public:
void additem()
{
cout<<"enter item name:";
cin>>item_name;
cout<<endl;
cout<<"enter the item price:";
cin>>item_price;
}
void printBill()
{
cout<<"\n Item Name"<<setw(12);
cout<<setw(2)<<" item's price"<<endl;
cout<<" "<<item_name;
cout<<" "<<item_price;
}
};
void main(void)
{
int n=0;
table t1[MAX];
char ans;
cout<<endl;
cout<<" ********** Order for table1 ******"<<endl;
do
{
cout<<" item no : "<<n+1<<endl;
t1[n++].additem(); //for adding items
cout<<"Enter another (y/n)?";
cin>>ans;
if(n >= MAX)
{
cout<<" stop here"<<endl<<endl;
break;
}
}
while(ans !='n');
cout<<"******* BILL of Table1 *****";
for(int j=0;j<n;j++)
{
cout<<endl;
cout<<j+1;
t1[j].printBill(); //function for printing bill on the screen
cout<<endl;
}
}
*****************************End of the Program**********************************************
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Program:
Write a program that will input 3 integers representing the MONTH, DAY, YEAR and will determine if these numbers represent an actual calendar date.
Step 1:
Course check. Reject all dates with MONTH > 12 or MONTH < 1, or DAY > 31 or DAY<1.
This check will still allow some invalid dates to pass
Step 2:
Account for varied days of the month. Reject dates with DAY > 28 for MONTH == 2, DAY > 30 for
months witth 30 days and DAY > 31 for months with 31 days.
This check will not account for leap years.
Step 3:
Account for leap years. If YEAR is a leap year and MONTH == 2 then reject DAY > 29.
//solution:
#include <iostream.h>
void main(void)
{
int month,days,year;
int even,odd;
even = 2,4,6,8,10,12;
odd = 1,3,5,7,9,11;
cout<<"Enter the month of the year in number:";
cin>>month;
cout<<"Enter days of this month:";
cin>>days;
cout<<"enter the year:";
cin>>year;
if(month> 12 || month < 1 ||days >31 || days<1 ) //for step:1
cout<<" You did some thing wrong,so try again?"<<endl;
else if (days ==29 && month==2 ||days >30 && month==even ||days >31 && month ==odd) // for step 2:
cout<<"you did some thing wrong which is not allowed"<<endl;
else if (days ==30 && month ==2) //for step: 3
cout<<"This is not allowed for leap years,try some thing else?"<<endl;
else
cout<<"you entered correct date format:"<<endl;
}
*****************************End of the Program**********************************************
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Currency Conversion Program
//Filename:currcon.cpp
//This is currency conversion program it will convert dollrs into rupees and vice versa
// Also this will convert amount in pounds,shilling and pence into Pounds& pence only
#include<iostream.h>
void main()
{
float pound,shilling,pence;
float decimalpounds;
long int rupees,dollar;
int cents,paisa;
float currentRate;
//cout<<"\n*********Programmer:Tariq Chaudhary ******"<<endl;
//cout<<"\n";
cout<< "If you want to end this program just type 100.5"<<endl;
cout<<"current rate:";
cout<<endl;
do
{
cout<<" Enter the amount in Pounds?";
cin >> pound;
cout<<"\n";
cout<<" Enter the amount in shilling?";
cin >> shilling;
cout<<"\n";
cout<<" Enter the amount in pence?";
cin >> pence;
cout<<"\n";
decimalpounds=pound+((shilling /20)+(pence/100));//This will convert the amount in decimal pounds
cout<<"\n";
cout<<"The required amount in decimal pounds is: £"<<decimalpounds<<endl<<endl;
cout<<"** Next is Currency conversion Program**";
cout<<"\n";
cout<<" Enter the amount in Dollars?";
cin >> dollar;
cout<<"\n";
cout<<" Enter the amount in Cents?";
cin >> cents;
cout<<"\n";
cout<<" Enter the current Rate/value of the Pak currency?";
cin >>currentRate;
rupees =( dollar+(cents/100)) * currentRate; // This calculation depends upon the current market rate
cout<<"\n";
cout << "** The Equivalent ammount in Rupees is :Rs "<<rupees<<endl;
cout<<"\n";
cout<<" Enter the amount in Rupees?";
cin >> rupees;
cout<<"\n";
cout<<" Enter the amount in Paisas?";
cin >> paisa;
cout<<"\n";
dollar = (rupees+(paisa/100))/currentRate; //This calculation will convert the rupees into US dollar
cout << "** The Equivalent ammount in Dollars is :$ "<<dollar<<endl;
cout<<"\n";
}while ( currentRate != 100.5 );
cout<<" $$$$$$$This is end of the program $$$$$$$$$" ;
}
*****************************End of the Program**********************************************
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