C++ 字符串交换字符位置
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C++ string swap character places
提问by RnD
is there a way to swap character places in a string? For example if I have "03/02"I need to get "02/03".
Any help is appreciated!
有没有办法交换字符串中的字符位置？例如，如果我有"03/02"我需要得到"02/03". 任何帮助表示赞赏！
回答by Kerrek SB
Sure:
当然：
#include <string>
#include <algorithm>
std::string s = "03/02";
std::swap(s[1], s[4]);
回答by Oliver Charlesworth
std::swap(str[1], str[4]);
回答by Paul Manta
There is. :)
有。:)
std::swap(str[i], str[j])
std::swap(str[i], str[j])
回答by Mahmoud Al-Qudsi
Wait, do you really want such a specific answer? You don't care about if the string is 2/3 instead of 02/03?
等等，你真的想要这样一个具体的答案吗？你不在乎字符串是 2/3 而不是 02/03？
#include <string.h>
#include <iostream>
bool ReverseString(const char *input)
{
const char *index = strchr(input, (int) '/');
if(index == NULL)
return false;
char *result = new char[strlen(input) + 1];
strcpy(result, index + 1);
strcat(result, "/");
strncat(result, input, index - input);
printf("%s\r\n", result);
delete [] result;
return true;
}
int main(int argc, char **argv)
{
const char *test = "03/02";
ReverseString(test);
}
