将内存分配给char * C语言 [英] Allocating memory to char* C language

问题描述

这是为char *分配内存的正确方法.

Is it the correct way of allocating memory to a char*.

char* sides ="5";

char* tempSides;

tempSides = (char*)malloc(strlen(inSides) * sizeof(char));

推荐答案

几乎.字符串以NULL终止，因此您可能想分配一个额外的字节来存储NULL字节.也就是说，即使sides为1个字符长，它实际上还是2个字节:{5，'\0'}.

Almost. Strings are NULL terminated, so you probably want to allocate an extra byte to store the NULL byte. That is, even though sides is 1 character long, it really is 2 bytes: {5,'\0'}.

应该是:

tempSides = (char *)malloc((strlen(sides)+1)*sizeof(char));

，如果您想将其复制到:

and if you wanna copy it in:

strcpy(tempSides, sides);

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