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I am using string in c++. And I am getting unusual answers sometimes if I don't initialize strings.
What is good practice don't initialize the string or If it has to be initialized What is the best way to do it?
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If you are talking about std::string , you don't need to "initialize" it because it is automatically initialized to the empty string in its constructor. If you mean const char * or char * , then yes, you should initialize them because by default they point to garbage. Then you may consider remove it. As you wish.
Highlights: There are four methods of initializing a string in C: Assigning a string literal with size. Assigning a string literal without size. Assigning character by character with size.
To declare and initialize a string variable: Type string str where str is the name of the variable to hold the string. Type ="My String" where "My String" is the string you wish to store in the string variable declared in step 1. Type ; (a semicolon) to end the statement (Figure 4.8).
String initialization can be done in two ways: Object Initialization. Direct Initialization.
If by "string", you mean char*, then yes, they should be (even must be, or at least is it strongly recommended) initialized, like any other variable by the way.
If by "string", you mean std::string, then they are initialized to empty string ("") automatically by default (default constructor).
std::string str;
std::cout << str; // will print nothing (empty string) for sure
char* str2;
std::cout << str2; // will most likely print garbage or even crash
The standard advice in c++ is always initialize all your variables. So yes, you should initialize it. That's just good practice.
When you say "unusual answers" we need more details to offer more advice.
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If you are talking about std::string, you don't need to "initialize" it because it is automatically initialized to the empty string in its constructor.
If you mean const char * or char *, then yes, you should initialize them because by default they point to garbage.
1
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