Hi everybody I need some help with my current program. I am supposed to identify the lowest two consecutive numbers in the sorted array with the smallest difference between them, along with other functions as you can see. I am having trouble even beginning to write this part of the code. Any tips or advice would be greatly appreciated!! Thanks in advance.
CODE
#include <stdio.h>
#include <math.h>
void average( double Z[] , int n , double *avg );
void stats( double Z[] , int n , double avg , double *variance, double *std_dev );
void descending( double Z[] , int r );
void median( double Z[] , int n , double *med);
main ()
{
double Z[100];
int n , r , flag;
double avg , med;
double variance , std_dev;
FILE *infile;
printf("\n\nThis program is the work of Ben Hogan, ID #211");
printf("\n'program_5_v_4.c' Due 3/31/08");
infile = fopen("program_5_2.dat" , "r");
r = 0.;
flag = fscanf(infile ,"%lf" , &Z[r]);
while( 1 == flag ) {
while ( Z[r] > 0. ) {
r = r + 1;
flag = fscanf(infile ,"%lf" , &Z[r]);
}
n = r;
descending( Z , r );
average( Z , n , &avg );
stats( Z , n , avg , &variance , &std_dev );
median( Z , n , &med);
printf("\nAverage = %9.2f\n" , avg );
printf("Median = %9.2f\n\n" , med );
printf("Standard Deviation = %.2f\n\n" , std_dev );
printf("The number of entries in the array is: %d \n\n" , n );
}
system("pause");
}
/**************** End of Main ***************************************/
/************ Start of Descending **********************************/
void descending( double Z[] , int r )
{
int j , k , index_next_smallest , n;
double temp , next_smallest;
FILE *infile;
infile = fopen("program_5_2.dat" , "r");
for (r = 0; Z[r] > 0.; r = r + 1 ) {
fscanf(infile, "%lf" , &Z[r]);
}
n = 100;
for(j = 0; j < n - 1; j = j + 1) {
next_smallest = Z[j];
index_next_smallest = j;
for (k = j; k < n; k = k + 1) {
if (Z[k] > next_smallest) {
next_smallest = Z[k];
index_next_smallest = k;
}
}
temp = Z[j];
Z[j] = Z[index_next_smallest];
Z[index_next_smallest] = temp;
}
printf("\n\nVALUES SORTED: \n\n");
for (r = 0; Z[r] > 0.; r = r + 1 ) {
printf("%g\n" , Z[r] );
}
}
/******************* End of descending *****************************/
/****************** Start of average ******************************/
void average( double Z[] , int n , double *avg )
{
double sum;
int r;
sum = 0.;
for( r = 0; r < n; r = r + 1 ) {
sum = sum + Z[r];
}
(*avg) = sum / n;
}
/******************** End of average *********************************/
/******************** Start of stats *********************************/
void stats( double Z[] , int n , double avg , double *variance, double *std_dev )
{
int r;
double var;
var = 0.;
for( r = 0; r < n; r = r + 1 ) {
var = var + pow( (Z[r] - avg ) , 2. );
}
(*variance) = var / ( n - 1. );
(*std_dev) = sqrt( (*variance) );
}
/************* End of stats ******************************/
/************ Start of median ****************************/
void median( double Z[] , int n , double *med )
{
/* If n is even */
if (n % 2 == 0 ) {
(*med) = ( Z[n / 2 ] + Z[n / 2 - 1]) / 2.;
}
/* If n is odd */
else {
(*med) = Z[ n / 2 ];
}
}
/*********************** End of median *******************/
P.S. I have attached the data file. Thanks!!!
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