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C/C++ Users Group Library 1996 July
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C-C++ Users Group Library July 1996.iso
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v_08_09
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8n09024a
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1990-06-19
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745b
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44 lines
#include <stdio.h>
#include <stdlib.h>
#define NUMELEM(a) (sizeof(a)/sizeof(a[0]))
main()
{
int cmpia(const void *, const void *);
int array[] = {25, 3, 22, -5, 3, 24};
int i;
qsort(&array[0], NUMELEM(array), sizeof(int), cmpia);
printf("ascending integer order\n");
for (i = 0; i < NUMELEM(array); ++i)
printf("array[%d] = %2d\n", i, array[i]);
return 0;
}
/* compare ints in ascending order */
int cmpia(const void *pe1, const void *pe2)
{
const int *pi1 = pe1;
const int *pi2 = pe2;
if (*pi1 < *pi2)
return -1;
else if (*pi1 == *pi2)
return 0;
else
return 1;
}
ascending integer order
array[0] = -5
array[1] = 3
array[2] = 3
array[3] = 22
array[4] = 24
array[5] = 25