some questions about structure

Hi

I am making a small program of students, where the user inputs the students details as age,class,name and address.


I am making a structure for the student and wanted to know that if we make a structure using strings as:

Code:

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string student_name;
string student_address;
string student_age;



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Do we have to define the variables of these data members using "string" or we can even define their variables using "char"?

Also do we initialize the data members using :

Code:

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student ={"student_name","student_address", "student_age"};


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I mean in these curly brackets do we simply enter the data members or we have to mention the exact name,address and age of the student?


Also before making struct for student do we also have to enter the pre processor for string as:

Code:

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# include<string>

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I hope I am clear

Quote:

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Originally Posted by student111

Code:

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student ={"student_name","student_address", "student_age"};


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this will cause the values of student_name, student_address, and student_age to be set to the literal values "student_name", "student_address" and "student_age"

Quote:

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I mean in these curly brackets do we simply enter the data members or we have to mention the exact name,address and age of the student?

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you can put variable names in there, or literal values. you have literal values in your example.

Quote:

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Also before making struct for student do we also have to enter the pre processor for string as:

Code:

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# include<string>

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yes, but string is in namespace std. so you'll need to either refer to the string type with its fully qualified name (std::string) or put the following line at the top of your source file, but after the #include line:

Code:

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using std::string;

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Quote:

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Originally Posted by student111

I am making a structure for the student and wanted to know that if we make a structure using

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You can do this. I would recommend a class (with proper setters and getters).
If your compiler supports initializer lists, then the syntax

Code:

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student ={"student_name","student_address", "student_age"};

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becomes possible too.
Otherwise I would urge you to rely on a constructor.

what is a literal value?

a string in quotes is a literal value. a number is a literal value. just about anything that you can use to assign a value to a variable, that is not itself a variable, a macro, or a function call, is a literal.

a few examples:

Code:

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std::string aLiteralString = "this is a literal string";
int aLiteralInt = 1234;
double aLiteralDouble = 314159265.0E-8;

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