Averages/Median: Difference between revisions

=={{header|C}}==

{{works with|GCC}}

<lang C>#include <stdio.h>

#include <stdlib.h>

typedef struct floatList {

float *list;

int size;

} *FloatList;

int floatcmp( const void *a, const void *b) {

if (*(float *)a > *(float *)b) return 1;

else if (*(float *)a < *(float *)b) return -1;

else return 0;

}

float median( FloatList fl )

{

qsort( fl->list, fl->size, sizeof(float), floatcmp);

return 0.5 * ( fl->list[fl->size/2] + fl->list[(fl->size-1)/2]);

}

int main()

{

static float floats1[] = { 5.1, 2.6, 6.2, 8.8, 4.6, 4.1 };

static floatList flist1 = { floats1, sizeof(floats1)/sizeof(float) };

static float floats2[] = { 5.1, 2.6, 8.8, 4.6, 4.1 };

static floatList flist2 = { floats2, sizeof(floats2)/sizeof(float) };

printf("flist1 median is %7.2f\n", median(&flist1)); /* 4.85 */

printf("flist2 median is %7.2f\n", median(&flist2)); /* 4.60 */

return 0;

}</lang>