# For loop with a two-dimensional array

This is a discussion on For loop with a two-dimensional array within the C Programming forums, part of the General Programming Boards category; Hey! I'm working on a program that will calculate prices for coins. I'm using a two-dimensional array to save the ...

1. ## For loop with a two-dimensional array

Hey!

I'm working on a program that will calculate prices for coins. I'm using a two-dimensional array to save the year, and the condition of the coin.

Here are the basics.

Code:
```j = 0;
k = 0;

coinCount = 2; // previously prompted

for (i = 0; i < coinCount; i++)
{
printf("\nYear: ");
coin[j][k] = check(a); //A function that validates the input
k++;

printf("\nCondition: ");
coin[j][k] = check(a);
j++;
}

j = 0;
k = 0;

// For every coin, check if condition is 1.

for (i = 0; i < coinCount; i++)
{
if (coin[j][1] == 1)
{
mint = mint + (3 * coin[j][0]); // THIS doesn't work.
j++;
}
}
```

I'm trying to make it print the variable 'mint', but it only stores the values from one loop. Am I doing something terribly wrong?

Is a two-dimensional array the way you would approach this?
Is there a way to make "object-like" things in C?
Like Coin1.year and Coin1.condition?

Thank you and sorry for my bad language :)

2. First, use "paste as text" when you paste code, then it looks like this
Code:
```  j = 0;
k = 0;

coinCount = 2;                // previously prompted

for (i = 0; i < coinCount; i++) {
printf("\nYear: ");
coin[j][k] = check(a);      //A function that validates the input
k++;

printf("\nCondition: ");
coin[j][k] = check(a);
j++;
}

j = 0;
k = 0;

// For every coin, check if condition is 1.

for (i = 0; i < coinCount; i++) {
if (coin[j][1] == 1) {
mint = mint + (3 * coin[j][0]); // THIS doesn't work.
j++;
}
}```

Next, look at your loop variables.
Code:
```  for (i = 0; i < coinCount; i++) {
if (coin[j][1] == 1) {
mint = mint + (3 * coin[j][0]); // THIS doesn't work.
j++;
}
}```
You don't need j at all.

In fact, in all the code, you may as well stick with coin[i][0] and coin[i][1]

3. Originally Posted by slimd
Is there a way to make "object-like" things in C?
Like Coin1.year and Coin1.condition?
That is a struct in C. Example

Code:
```typedef struct {
int year;
char condition[100];
} COIN;```
Code:
```COIN Coin1;
Coin1.year = 1920;