Difference between strcpy and memcpy (reprinted)

Strcpy and memcpy are both standard C library functions, which have the following features.
Strcpy provides string replication. That is, strcpy is only used for string copying. It not only copies the content of the string, but also copies the end character of the string.

It is known that the prototype of the strcpy function is char * strcpy (char * DEST, const char * SRC );
Memcpy provides general memory replication. That is, memcpy has no restrictions on the content to be copied, so it is widely used.
Void * Memcpy ( Void *Dest, Const Void *SRC, Size_t Count );

char * strcpy(char * dest, const char * src) // Implement the replication from SRC to dest{　　if ((src == NULL) || (dest == NULL)) // Determine the validity of the SRC and DEST Parameters　　{ 　　　　　　return NULL;　　}　　char *strdest = dest;        // Save the first address of the target string　　while ((*strDest++ = *strSrc++)!=‘\0‘); // Copy the contents of the SRC string to dest　　return strdest;}void *memcpy(void *memTo, const void *memFrom, size_t size){　　if((memTo == NULL) || (memFrom == NULL)) // Memto and memfrom must be valid         return NULL;　　char *tempFrom = (char *)memFrom;             // Save the first memfrom address　　char *tempTo = (char *)memTo;                  // Save the first memto address　　while(size -- > 0)                // Loop size times, copy the value of memfrom to memto       　　*tempTo++ = *tempFrom++ ;  　　return memTo;}

Strcpy and memcpy have the following three differences.
1. The copied content is different. Strcpy can only copy strings, while memcpy can copy any content, such as character arrays, integers, struct, and classes.
2. The replication method is different. Strcpy does not need to specify the length. It ends with the string Terminator "\ 0" of the copied character, so it is prone to overflow. Memcpy decides the copy Length Based on its 3rd parameters.
3. Different purposes. Strcpy is usually used to copy strings, while memcpy is generally used to copy data of other types.

 

Reprinted from http://www.cnblogs.com/stoneJin/archive/2011/09/16/2179248.html

Difference between strcpy and memcpy (reprinted)