std::memset、std::memcpy和std::strcpy的区别 memset Fill block of memory <cstring> void * memset ( void * ptr, int value, size_t num ); Sets the firstnumbytes of the block of memory pointed byptrto the specifiedvalue(interpreted as anunsigned char). Parameters ptr Pointer to the block ...
strcpy是拷贝字符串，以\0为标志结束（即一旦遇到数据值为0的内存地址拷贝过程即停止） strcpy的原型为 char *strcpy(char *dest, const char *src) 而memcpy是给定来源和目标后，拷贝指定大小n的内存数据，而不管拷贝的内容是什么
memset Fill block of memory <cstring> void * memset ( void * ptr, int value, size_t num );Sets the first num bytes of the block of memory pointed by ptr to the specified value (interpreted as an unsigned char).Parameters ptr Pointer to the block of memory to fill.value ...
memcpy 和 memmove 都是拷贝内存,区别就是 memmove 会检查两段内存是否有重叠来决定数据复制的方向 而memcpy 则不检查(古老版本的 memcpy 会检查重叠,后来优化成性能更好的不检查,历史遗留问题) - memcpy=std::ptr::copy - memmove=std::ptr::copy_nonoverlapping Reference: <https://v2ex.com/t/926553>1...
std::memset、std::memcpy和std::strcpy的区别 memset Fill block of memory <cstring> void * memset ( void * ptr, int value, size_t num ); Sets the firstnumbytes of the block of memory pointed byptrto the specifiedvalue(interpreted as anunsigned char)....