Array of Structs

[djgirotto]

I am looking into creating an array of structs, how would I go about doing that?

#include <iostream>
#include <cstring>
using namespace std;

void etc(struct Student* harry2);
 int x[2];
 struct Student{
     int no;
     char grade[14];
 };

int main(){

struct Student harry = {234, "ABC"};
etc(&harry);
return 0;
}

void etc(struct Student* harry2){
cout << "enter no." << endl;
cin >> (*harry2).no;
cout << (*harry2).no << " " << (*harry2).grade << endl;
}

I want an array of structs, eachj stuct being a different student with their own student number and course grade within each structure. Thanks.

[treuss]

I want an array of structs, eachj stuct being a different student with their own student number and course grade within each structure. Thanks.

Student array_of_students[42];

[djgirotto]

Student array_of_students[42];

How would I access each member?

Student array_of_students[x].no

?

[Raislin]

Pretty much, minus the Student at the beginning. Accessing no of the first member would be like this:

array_of_student[0].no

[nuzzle]

I want an array of structs,

You could use the new STL array.

http://www.codeguru.com/cpp/cpp/cpp_...le.php/c15257/

[djgirotto]

Say I wanted to do this..

...

Student studentArray[10];  //declaration of Struct array

struct Student studentArray[10]{ 
   int no;                    
   char grade[3];      //struct members
   double average;
};

   int x;

for(x = 0; x < 10; x++){
   cin >> intInput;
   cin >> charInput;
   cin >> doubleInput;

   Student studentArray[x].no = input1;
   Student studentArray[x].grade = input2;
   Student studentArray[x].average = input3;

   intInput = 0;
   charInput = "";
   doubleInput = 0.0;
}

...

What is incorrect about this? I want to prompt the user to keep inputting values until they've done it 10 times. Store each set of 3 values in it's own separate struct element of the array.

[laserlight]

The syntax. Your struct is not defined correctly, i.e., it should not have the [10] that is between the struct name and the opening brace.

This:

Student studentArray[x].no = input1;
Student studentArray[x].grade = input2;
Student studentArray[x].average = input3;

should be:

studentArray[x].no = input1;
studentArray[x].grade = input2;
studentArray[x].average = input3;

But now it looks like you got mixed up between intInput and input1, etc.

Actually, you could simplify the whole loop to:

for (int x = 0; x < 10; ++x) {
    cin >> studentArray[x].no
        >> setw(3) >> studentArray[x].grade
        >> studentArray[x].average;
}

[djgirotto]

The syntax. Your struct is not defined correctly, i.e., it should not have the [10] that is between the struct name and the opening brace.

This:

Student studentArray[x].no = input1;
Student studentArray[x].grade = input2;
Student studentArray[x].average = input3;

should be:

studentArray[x].no = input1;
studentArray[x].grade = input2;
studentArray[x].average = input3;

But now it looks like you got mixed up between intInput and input1, etc.

Actually, you could simplify the whole loop to:

for (int x = 0; x < 10; ++x) {
    cin >> studentArray[x].no
        >> setw(3) >> studentArray[x].grade
        >> studentArray[x].average;
}

What does the setw(3) do?

I pretty much want to loop x amount of times and prompt the user for those 3 inputs, store those 3 inputs in a separate struct for x elements of the array. Then be able to regurgitate/edit those values That's basically it.

[potatoCode]

What does the setw(3) do?

setw

[treuss]

First define the struct "Student".

Then define your variable "studentArray" as an array of Students.

The other way around is neither logical nor does it work.