using a pointer to point to an array of a stucture
Author
I have been having problems.My code liike like this.
CandyBar * ps = new CandyBar[3];
the CandyBar part is a structure.I can't assign any values to the array.
Quote:Original post by mattnenterpriseWe will need more information. What do you mean by 'you can't assign any values to the array'? Are you getting an error? And if so, what kind of error? Compile-time? Run-time? An assertion? An exception? A crash? How do you know the values aren't being assigned?
I have been having problems.My code liike like this.
CandyBar * ps = new CandyBar[3];
the CandyBar part is a structure.I can't assign any values to the array.
Post some more code, along with any error messages you're receiving and/or a description of the observed behavior.
Author
i am trying to assing values to it like this
ps[0] =
{
"Mocha Munch , 2.3 , 350
};
but it says I need a ; before the first brace when I try to compile it
can someone tell me what I'm doing wrong.
ps[0] =
{
"Mocha Munch , 2.3 , 350
};
but it says I need a ; before the first brace when I try to compile it
can someone tell me what I'm doing wrong.
make sure you are accessing them correctly...ie
ps[0].yummy = true;
ps[0].cost = $1.75
ps[1].yummy = false;
ps[1].cost = $100
etc....
ps[0].yummy = true;
ps[0].cost = $1.75
ps[1].yummy = false;
ps[1].cost = $100
etc....
Quote:Original post by mattnenterpriseBracket notation can only be used to initialize, not to assign.
i am trying to assing values to it like this
ps[0] =
{
"Mocha Munch , 2.3 , 350
};
but it says I need a ; before the first brace when I try to compile it
can someone tell me what I'm doing wrong.
Here is an example of how this might be written in idiomatic C++:
std::vector<CandyBar> = boost::assign::list_of (CandyBar("Mocha Munch", 2.3, 350)) (CandyBar(...)) (CandyBar(...));
Or you could make a constructor to your structure and then assign the values like this:
ps[0] = CandyBar(true, 1.75)
ps[1] = CandyBar(false, 100)
ps[0] = CandyBar(true, 1.75)
ps[1] = CandyBar(false, 100)
You are using initialisation syntax, but the struct has already been initialised. The easiest way would be to write an explicit constructor, and to use std::vector instead of new[], delete[] pairs:
struct CandyBar{ std::string name; float cost; int sugaryGoodness; CandyBar(const std::string &name, float cost, int goodness) : name(name), cost(cost), sugaryGoodness(goodness) { }};// in whatever functionvoid foo(){ std::vector<CandyBar> bars; bars.push_back(CandyBar("Mocha Munch" , 2.3 , 350)); // can access like an array std::cout << bars[0].name << '\n';}This topic is closed to new replies.
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