memcmp

1 Description
2 Syntax
3 Parameters
4 Return
5 Examples
6 Remark
7 See Also
8 header to Include
9 Reference

Description

Compares characters between two buffers.

Syntax

int memcmp( LPCVOID lpMem1, LPCVOID lpMem2, size_t uSize )

Parameters

lpMem1: [input] First buffer
lpMem2: [input] Second buffer
uSize: [input] Number of characters to compare.

Return

Returns an integer < 0 if lpMem1 is less than lpMem2, returns 0 if lpMem1 is identical to lpMem2, and returns an integer > 0 if lpMem1 greater than lpMem2.

Examples

EX1

void memcmp_ex1()
{
    char    szFirst[] = "1234567890";
    char    szSecond[] = "1234567891";
    size_t  nNumerOfBytesToCompare = 9;  // change this to 10 to see a different result
    int     nResult = memcmp(szFirst, szSecond, nNumerOfBytesToCompare);
    if (0 == nResult)
        out_str("Equal");
    else if (0 > nResult)
        out_str("First is less than second");
    else
        out_str("First is greater than second");
}