This is C++ section http://www.cppjj.com/forum/list.php?9 Thu, 09 Sep 2010 07:08:22 -0600 Phorum 5.2.9a http://www.cppjj.com/forum/read.php?9,59,59#msg-59 http://www.cppjj.com/forum/read.php?9,59,59#msg-59 admin C++ Thu, 24 Sep 2009 21:59:34 -0600 http://www.cppjj.com/forum/read.php?9,44,44#msg-44 http://www.cppjj.com/forum/read.php?9,44,44#msg-44 // This project asks the user for a series of grade.
// Then, it will caculate the grade average, standard Deviation
// Then it prints out how many grades the user entered,
// The average, standard deviation, max, and the min of the grades.
// The program will exit if the user enters -1, numbers that are not

// Between 0 and 100 or the user entered more than 100 numbers
//

#include< iostream >
#include< cassert >
#include< math.h >
using namespace std;

void get_grades(double a[], int size, int& numnberUsed);
void sort_grades(double a[], int& numberUsed);
void comp_stats(double a[], int& numberUsed);

//This is the main method
// It prints out the grade in a sorting oder
// The grades will be print 10 per row

int main()
{


double sampleArray[100]; // set the array with size 100
int numberUsed;
get_grades(sampleArray, 100, numberUsed); // passing the sampleArray, size, and number used into the function get_grade
sort_grades(sampleArray, numberUsed);//passing sampleArray, and numberUsed into the function sort_grade

cout<<"\n";

//Using a loop to print out the array
//Check the condition, if the reminder of the index equals to 0 go to the next line

for(int index = 0; index < numberUsed; index++)
{
if(((index)%10)==0 && index !=0)
cout<<"\n";
cout<>next;

// If user enters something more than 100 or less than 0
// The program will terminate
//
if((next>=100) || (next < -1 ))
{
cout<<"Error: number must be between 0 and 100\n "
<<"Program will exit\n";
system("PAUSE");
exit(1);
}
// The program will continue to loop until the user enters -1
// Two condition inside the loop
//
else
while(next != -1)
{
a[index]= next;
index++;
cout<<"?";
cin>>next;

// If the user enters something that is below 0 or above 100
// The program terminates
//
if((next>=100) || (next < -1 ))
{
cout<<"Error: number must be between 0 and 100\n"
<<"Program will exit\n";
system("PAUSE");
exit(1);

}
// If the user enters more than 100 grades
// The program terminates
//
if(index > size)
{
cout<< " Warning: maximum number of grades reached\n"
<<"Program will exit now\n";
exit(1);
}


}
//Determines how many numbers the use entered
//
numberUsed = index;
}
// A void function that sorts the grade
// int& numberUsed holds the size that the user entered
//
void sort_grades(double a[], int& numberUsed)
{
double temp;
for(int index = 0; index < numberUsed-1; index++)
{
for(int j = (index + 1); j < numberUsed; j ++)
{
if(a[index] > a[j])
{
temp = a[index];
a[index] = a[j];
a[j] = temp;
}
}

}
}
// This is a void function that computes the mean, max, min, and standard deviation
//
void comp_stats(double a[], int& numberUsed)
{
double sum = 0, total = 0;
int index=0;
double max, ave, std, sqstd;
int startIndex = 0;
max = a[startIndex];
int indexOfMax = startIndex;
double dev[numberUsed];

for (index = 0; index < numberUsed; index++)
{
if(a[index] > max)
{
max = a[index];
indexOfMax = index;
}

sum = sum + a[index];

}

ave = static_cast(sum)/numberUsed;

for (index =0; index < numberUsed; index++)
{
dev[index] = ave - a[index];

}
for(index = 0; index < numberUsed; index++)
{
total = total + pow(dev[index], 2);

}

std = total / (numberUsed - 1);
sqstd = sqrt(std);

cout<<"Count = " << numberUsed << " Mean = " << ave
<<" Std. Dev.= "<< sqstd<<" Max.= " <<a[indexOfMax] <<" Min.= " << a[startIndex]
<<"\n";
}]]> jj C++ Wed, 11 Feb 2009 15:26:35 -0700 http://www.cppjj.com/forum/read.php?9,35,35#msg-35 http://www.cppjj.com/forum/read.php?9,35,35#msg-35 #include< stdlib.h >
#include< stdio.h >
#include< time.h >
using namespace std;

int main()
{
int Secret, Guess;
int n = 0;
srand( time(NULL) );

Secret = rand()%101;

cout<<"Welcome to Guess-my-Number version 0.1 \n"
<<"Copyright (C) Jay Lei 2009. All rights reserved.\n";

cout<<"\n"<<"\nA secret number between 1-100 generated...\n";
cout<>Guess;

if(Secret == Guess)
{
cout<<"Correct in " << n + 1 <<" guesses.\n";
break;
}
else if (Guess == 0)
{
cout<<"The secret number is " << Secret <<".\n";
}
else if(Secret < Guess)
{
cout<<"Guess is too high...";
}
else if(Secret > Guess)
{
cout<<"Guess is too low...";
}

n++;
}while((n <8) && (Guess !=0));
if (n==8)
{
cout<<"\n"<<"\nToo many guesses, the secret number is "
<<Secret<<".\n";
}

system("PAUSE");

return 0;

}]]> admin C++ Fri, 23 Jan 2009 16:41:10 -0700