左值要求作为增量操作 [英] lvalue required as increment operand

问题描述

GCC 4.4.4

gcc 4.4.4

也许我哑巴。但我做错了？

Maybe I am being dumb. But what am I doing wrong?

 char x[10];
 char y[] = "Hello";
 while(y != NULL)
     *x++ = *y++;

非常感谢任何建议，

Many thanks for any advice,

推荐答案

X ++是的缩写形式X = X + 1。然而，X这里是一个数组，你不能修改数组的地址。因此，与您的变量y的情况了。你能做什么定义两个指针指向两个数组，并增加这些指针或做到以下几点。

x++ is the short form of x = x + 1. However, x here is an array and you cannot modify the address of an array. So is the case with your variable y too. What you can do is defined two pointers pointing to the two arrays and increment those pointers or do the following.

 char x[10];
 char y[] = "Hello";
 int i=0;
 while(y[i] != 0)
 {
     *(x+i) = *(y+i);
     i++;
 }
 x[i] = 0;

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