INFO: qsort() Can Sort Data Structures Based on Multiple Fields

• The C Run-time (CRT), included with: - Microsoft C for MS-DOS, versions 5.1, 6.0, 6.0a, 6.0ax - Microsoft C for OS/2, versions 5.1, 6.0, 6.0a - Microsoft C/C++ for MS-DOS, version 7.0 - Microsoft Visual C++ for Windows, versions 1.0 1.5 - Microsoft Visual C++ 32-bit Edition, versions 1.0, 2.0, 4.0, 5.0

SUMMARY

The qsort() function in the Microsoft C run-time library does not restrict the methods an application can use to compare items. When qsort() compares two data elements, it calls an application-supplied comparison routine.

To sort an array of structures using more than one field as a key, create a comparison function that relates the appropriate fields in each structure and returns a comparison value to indicate the result.

Keywords          : CRTIss kbfasttip
Version           : MS-DOS:5.1,6.0,6.00a,6.00ax,7.0; OS/2:5.1,6.0,6.00a;  WINDOWS:1.0,1.5; WINDOWS NT:1.0,2.0,4.0,5.0
Platform          : MS-DOS NT OS/2 WINDOWS
Issue type        : kbinfo