// Statistics.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#define DATASIZE 20
#define NO        0
#define YES       1

void print_m(void);
float get_mean(float data[], int size);
float get_min(float data[], int size);



int _tmain(int argc, _TCHAR* argv[])
{
	float data[20] = {1.2, 8.9, 3.1, 2.3, 3.1, 4.1, 5.9, 6.2, 3.4, 2.7, 1.6, 1.9, 2.1, 8.4, 2.2, 2.3, 5.4, 6.5, 7.1, 9.0};

    int option, continue_key;
	float x, y;
    int n, j;
	char c, cc;

	do{
	    print_m();
		scanf("%d", &option);
		switch(option){
			case 1: printf("\n\nMean Value = %f\n\n", get_mean(data, DATASIZE));
					printf("Press <Enter> to continue:\n\n");
					c = getchar();
					while( ( c = getchar() ) != '\n')
						cc = c;
				    break;
			case 2: printf("\n\nMinimum Value = %f\n\n", get_min(data, DATASIZE));
					printf("Press <Enter> to continue:\n\n");
					c = getchar();
					while( ( c = getchar() ) != '\n')
						cc = c;
				    break;

			case 0: break;
			default: break;
		}
	   } while (option != 0);
	return (0);
}


void print_m(void)
{
	int i;

    for(i=1; i<40; i++)
        printf("\n");

    printf("Menu of a lot of Statistics functions...\n\n");
    printf("Option    Action\n");
    printf("------    ------\n");
	printf("   1      Compute Mean Value of Data Set \n");
	printf("   2      Compute Minimum Value of Data Set \n");
    printf("   0      End This Program \n\n\n");
    printf("Enter option 1 ... 2, or 0 to STOP\n\n");
    return;
}


float get_mean(float data[], int size)
{
	float mean_value = 0;
    float sum = 0;
	int i;

	for(i=0; i<size; i++)
		sum += data[i];

	mean_value = sum / size;

	return(mean_value);
}


float get_min(float data[], int size)
{
	float sorted_data[DATASIZE];
    int i, j;
	float temp;

	for(i=0; i<size; i++)
		sorted_data[i] = data[i];

	for(i=1; i<=size; i++)
		for(j=1; j<=size - i; j++)
			if(sorted_data[j] < sorted_data[j-1])
 		    {
			    temp = sorted_data[j];
			    sorted_data[j] = sorted_data[j-1];
			    sorted_data[j-1] = temp;
		    }

//for(i=0; i<DATASIZE; i++)
//printf("   %f  \n", sorted_data[i]);

	return(sorted_data[0]);
}