The C library memcmp() function can be used to compare two blocks of memory. In general, it is used to compare the binary data or raw data. Here, memcmp() accepts three variable as parameters that compares the first n bytes of memory area str1 and memory area str2. Syntax. Following is the syntax of the C library memcmp() function −

2023年7月10日 · int memcmp (const void * lhs, const void * rhs, std:: size_t count ); Reinterprets the objects pointed to by lhs and rhs as arrays of unsigned char and compares the first count bytes of these arrays.

C 库函数 int memcmp (const void *str1, const void *str2, size_t n)) 把存储区 str1 和存储区 str2 的前 n 个字节进行比较。 下面是 memcmp () 函数的声明。 str1 -- 指向内存块的指针。 str2 -- 指向内存块的指针。 n -- 要被比较的字节数。 如果返回值 < 0，则表示 str1 小于 str2。 如果返回值 > 0，则表示 str1 大于 str2。 如果返回值 = 0，则表示 str1 等于 str2。 下面的实例演示了 …

2022年12月1日 · int memcmp( const void *buffer1, const void *buffer2, size_t count ); int wmemcmp( const wchar_t * buffer1, const wchar_t * buffer2, size_t count ); Parameters. buffer1 First buffer. buffer2 Second buffer. count Number of characters to compare. (Compares bytes for memcmp, wide characters for wmemcmp). Return value

2025年1月8日 · In C, memcmp() is a built-in function used to compare the given number of bytes of data pointed by two pointers passed as arguments. It returns an integer indicating whether the first memory block is less than, equal to, or greater than the second.

Compares the first num bytes of the block of memory pointed by ptr1 to the first num bytes pointed by ptr2, returning zero if they all match or a value different from zero representing which is greater if they do not. Notice that, unlike strcmp, the function does not stop comparing after finding a null character. Pointer to block of memory.

The memcmp() function returns an integer less than, equal to, or greater than zero if the first n bytes of s1 is found, respectively, to be less than, to match, or be greater than the first n bytes of s2.

2024年5月30日 · Compares the first count bytes of the objects pointed to by lhs and rhs. The comparison is done lexicographically. The sign of the result is the sign of the difference between the values of the first pair of bytes (both interpreted as unsignedchar) that differ in the objects being compared.

In the C Programming Language, the memcmp function returns a negative, zero, or positive integer depending on whether the first n characters of the object pointed to by s1 are less than, equal to, or greater than the first n characters of the object pointed to by s2.

2023年5月29日 · memcmp() function compares the first count bytes ( given number of characters ) of the memory pointed to by buf1 and buf2. memcmp() is a Standard Library function defined in <string.h> header file in C++.