逆序输出字符串

[zero_226]

void ReverseString(const char* str){
int length = strlen(str) + 1;
char* desc =(char*)malloc(length*sizeof(char));
memset(desc, 0, length);
desc += length;
while(*str != '\0'){
*desc-- = *str++;
}
cout << desc << endl;
free(desc);
}

这是我写的逆序输出字符串函数，实现不了，麻烦大家帮忙看下错误在哪里，不胜感激！

[pengzhixi]

desc += length-1;

[liutengfeigo]

void ReverseString(const char* str){
int length = strlen(str) + 1;
char* desc =(char*)malloc(length*sizeof(char));
memset(desc, 0, length);
desc += length;
while(*str != '\0'){
*(--desc) = *(str++);
}
cout << desc << endl;
free(desc);
}

[pengzhixi]

LS的也可以

[liutengfeigo]

void ReverseString(const char* str){
int length = strlen(str) + 1;
char* desc =(char*)malloc(length*sizeof(char));
memset(desc, 0, length);
desc += length;
while(*str != '\0'){
*(--desc) = *str++;
}
cout << desc << endl;
free(desc);
}

[测试昵称666]

#include <iostream>
using namespace std;

void ReverseString(const char* str)
{
  
	int length = strlen(str);
	char* desc =(char*)malloc((length+1)*sizeof(char));
	memset(desc, 0, (length+1)*sizeof(char)); 
	desc += length-1;     //这个地方减一
	while(*str != '\0')   
	{ 
		*desc-- = *str++; 
	} 
	desc += 1;
	desc[length] = 0;   //可有可无
	cout << desc << endl;
	free(desc);
}

int main()
{
	char *str = "abcd";
	ReverseString(str);
}

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[starcat]

#include <iostream>
#include <string>
using namespace std;

void ReverseString(const char* str){
  int length = strlen(str) + 1;
  char* desc =(char*)malloc(length*sizeof(char));
  char *p = desc;
  memset(desc, 0, length);
  desc += length-1;
  while(*str != '\0'){
  *desc-- = *str++;
  }
  ++desc;
  string s(desc);
  cout << s << endl;
  free(p);
  //free(desc);
}

int main() {
	char a[] = "this is a test.";
	ReverseString(a);
	return 0;
}

不要问我为什么直接释放desc出错
我也不知道

[ithiker]

void ReverseString(const char* str){
  int length = strlen(str) + 1;
  char* desc =(char*)malloc(length*sizeof(char));
  memset(desc, 0, length);
  desc += length-2;//mark,因为数组下标都是从0开始的，故-2 
  while(*str != '\0'){
  *desc-- = *str++;
  }
  desc++;//mark，重置为首地址 
  cout << desc << endl;
  free(desc);
}

[测试昵称666]

没想到LZ居然喜欢看死神

[zero_226]

[Quote=引用 9 楼 wtq493841534 的回复:]

没想到LZ居然喜欢看死神
[/Quote]
我还喜欢火影，还有水果篮子，水果篮子真的不错

[yi_xingzhe]

如果想实现任意字符的逆序，建议使用栈