C++ Classes/array of strings question

[JC724]

I need to know how to assign a value to a public class member.

Like here is my data structure.

class CFG_Rules {

public:
string LHS;
string RHS[500];
int ruleNumber;
};

I declared this in my main function() {
CFG_Rules myRules[1000];
}

passed it into my void function in main like this.

void printRules(CFG_Rules myRules[], token_type t) {
LHS[l] = current_token;
myRules[l].LHS = LHS[l];
cout <<"LHS "<<LHS[l]<<endl;

nTerms = current_token;
myRules[l].RHS = nTerms;
}

assigning the string value to the array LHS[l] and nTerms works, but it is not working for the data structure.

I have been working on this for hours.

I tried to print a test case and it is empty. how do I assign it a value. i tried strcpy but that gives me an array asking for char arrays. I want to use strings.

 

[modi123]

Ah, what? What's with the text having a 'strike through'?

 

[Armenius]

It would help if you actually included your entire void function for us. Like what data type is the LHS array, where is the current_token variable defined, etc.

Have you stepped through your program in debug, yet? It's usually easy to find what you're doing wrong while debugging.

 

[Absalom]

You've given us too little information to go on. How are you calling your printRules() function from main()? Where are your type declarations for both arguments and local variables? There is a large assumption that all variable types in printRules are of type string.

As a side note, don't use C library utilities like strcpy on a C++ string, that leads to disaster. If you're intending to use C++ string, then stick with C++ facilities like the copy assignment (=) operator or std::copy. Avoid mix and matching C strings, char arrays, and C++ string when possible.

 

[JC724]

Thanks I figured it out. Why is the bottom part of my Original Post scratched out?

 

[Armenius]

Thanks I figured it out. Why is the bottom part of my Original Post scratched out?

Because of the

[S]

you used in dereferencing your nTerms array. You can avoid that by using code blocks in your post.