/* Program to compute the mean, median and mode of a data set*/ #include #define SIZE 99 using namespace std; // Defining function prototypes void mean( const int ans[]); void median(int ans[]); void mode(int freq[], int ans[]); void bubbleSort(int a[]); void printArray(const int a[]); int main(void) { int frequency [10] = {0}; // Initializing array frequency // Initializing response array int response[SIZE] = {6,7,8,9,8,9,8,9,5,5,2,1,3,4,5,6,3,5,4,8,5,8,8,8,8,9,9,4,6, 3,6,9,8,7,9,8,9,6,5,8,9,7,5,2,7,7,7,8,8,5,7,7,7,7,7,7, 2,2,2,2,3,5,4,5,6,5,6,5,6,5,4,5,6,5,4,7,5,8,6,8,8,8,8,8 }; // Processing responses mean (response); median (response); mode (frequency, response); return 0; } // End of main // Defining the mean function to calculate the average of all data entries void mean( const int ans[]) { int j; // Initializing a counter for totalling array elements int total = 0; // Initializing variable to hold the sum of the array elements // Printing a heading cout <<"******\n" << "Mean\n" << "******\n"; // For loop to total the response values for(j = 0; j < SIZE; j++) { total += ans[j]; } // end of for loop // Printing the output of the for loop cout << "The mean value for this run is: " << total/SIZE << "\n\n"; } // End of mean funtion // FUnction to sort an array void bubbleSort(int a[]) { int pass; // Initializing pass counter int j; // Initializing comparison counter int hold; // Initializing temporary location to swap elements // For loop for control number of passes for (pass = 1; pass < SIZE; pass++) { // For loop to control number of comparisons per pass for(j = 0; j < SIZE - 1; j++) { if( a[j] > a[j+1] ) { hold = a[j]; a[j] = a[j+1]; a[j+1] = hold; } // End of if } // End of inner for loop } // End of outer for loop } // End of bubbleSort function // Defining the meadian function void median(int ans[]) { // Printing a heading cout <<"******\n" << "Median\n" << "******\n"; // Printing the unsorted array printArray(ans); // Sorting the array bubbleSort(ans); cout << "\n\nThe sorted array is: \n"; // Printing the sorted array printArray(ans); // Outputing the median cout << "\nThe median for this element array is: " << ans[SIZE/2] << " which is element "<< SIZE/2 << "\n\n"; } // End of median function // Defining the mode function void mode(int freq[], int ans[]) { int j; // Initializing counter for elements 0-98 of ans array int h; // Initializing counter for displaying histogram elements in array freq int rating; //Initializing counter for accessing element 1-9 in array freq int largest = 0; // Represents largest frequency int modeValue = 0; // Represents most frequent response // Printing a heading cout <<"******\n" << "Mode\n" << "******\n"; // For loop to initalize frequencies to 0 for(rating = 1; rating <= 9; rating++) { freq[rating] = 0; } // End of for loop // For loop to summarize frequencies for (j = 0; j < SIZE; j++) { ++freq[ ans[j] ]; } // End of for loop // Printing output headers for results columns cout << "Response " << "Frequency " << "Histogram \n"; // For loop for outputing results for(rating = 1; rating <= 9; rating++) { cout << rating << " " << freq[rating]; if (freq[rating] > largest) { largest = freq[rating]; modeValue = rating; } // End of if // For loop for outputing histogram for( h = 1 ; h <= freq[rating]; h++) { cout << "*"; } // End of inner for loop // Beginning new line for output cout << "\n"; } // End of outer for loop // Displaying mode value cout << "The mode value for this run is: " << modeValue << " which occured " << largest << " times"<< endl; } // End of mode function // Function to output array contents void printArray(const int a[]) { int j; // Initializing counter // For loop to output array contents for(j = 0; j < SIZE; j++) { if(j % 20 == 0) { cout << "\n"; } // End of if cout << a[j]; } // End of for loop } // End of printArray function

Program to compute mean, median and mode of data set