[基础-001]C++字符串转换(char*，const char*，string)

1. string转const char*

1 string str ="abc";
2 const char* charArr = str.c_str();

2. const char*转string

1 const char* charArr = "abc";
2 string str(charArr);

3. string转char*

1 string str ="abc";
2 char* charArr;
3 const int len = str.length();
4 charArr =new char[len+1];
5 strcpy(charArr, str.c_str());

4. char*转string

1 char* charArr ="abc";
2 string str(c);

5. const char*转char*

1 const char* charArr1 ="abc";
2 char* charArr2 = new char[100]; // 足够长
3 strcpy(charArr1, charArr2)

[基础-001]C++字符串转换(char，const char，string)