Struct C++ array in function parameters not working at all

Question

hello i have to do a program using an array of structures.. and i have to initialize it in a function. below i am trying, but my prototype keeps getting error "Expected primary expression".. i have followed tutorials but cant figure out what im doing wrong please help. i cant use pointers or vectors.. just basic stuff thank you for your time

struct gameCases{

bool flag = false;
int casenum;
double value;
};
 int initialize(gameCases cases);  //prototype

--- main()

gameCases cases[26];
initialize(cases);    //call

int initialize(gameCases cases)  //definition
{
double values[26] = {.01, 1, 5, 10, 25, 50,
                75, 100, 200, 300, 400, 500, 750, 1000,
                5000, 10000 , 25000, 50000, 75000, 100000,
                200000 , 300000, 400000, 500000,
                1000000, 2000000};

for (int i = 0; i < 26; i++)
{
    array[i].value = values[i];
}
}

Vlad from Moscow · Accepted Answer · 2014-11-04 19:04:16Z

1

Declare the function like

int initialize( gameCases *array, size_t n );

and call it like

initialize( cases, 26 );

Or you could pass the array by reference. For example

int initialize( gameCases ( &cases )[26] );

Take into account that the function is declared as having return type int but it acrually returns nothing.

edited Nov 4, 2014 at 19:04

answered Nov 4, 2014 at 17:44

Vlad from Moscow

313k27 gold badges204 silver badges358 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

user3349184 Over a year ago

thank you but the post says no pointers. can you devise a way to do this without pointers, Vlad?

Vlad from Moscow Over a year ago

@user3349184 You marked the post as best where the function parameter is a pointer though you said that a pointer shall not be used.:) This declaration gameCases cases[26] is equivalent to gameCases *cases The only correct solution is to use reference as I showed.

coyotte508 · Accepted Answer · 2014-11-04 19:27:02Z

0

int initialize(gameCases cases[26]);  //prototype

int initialize(gameCases cases[26])  //definition
{
    double values[26] = {.01, 1, 5, 10, 25, 50,
            75, 100, 200, 300, 400, 500, 750, 1000,
            5000, 10000 , 25000, 50000, 75000, 100000,
            200000 , 300000, 400000, 500000,
            1000000, 2000000};

    for (int i = 0; i < 26; i++)
    {
        cases[i].value = values[i];
    }
}

and to call:

initialize(cases);

edited Nov 4, 2014 at 19:27

answered Nov 4, 2014 at 19:18

coyotte508

9,8486 gold badges48 silver badges66 bronze badges

3 Comments

user3349184 Over a year ago

is call ... initialize(cases[]) ??

coyotte508 Over a year ago

updated my post. But really, the first solution given by Vlad from Moscow is the better one.

coyotte508 Over a year ago

in your case with your restrictions yes, in real life no

Collectives™ on Stack Overflow

Struct C++ array in function parameters not working at all

2 Answers 2

2 Comments

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related