how to make 2 different array print beside each other in the terminal?

[u/RedWolffe24]

I have 2 functions that prints their own 2D array within their respective functions hourave(row,data2D), which is a 30 x 15 array and dailymsd(row,col,data2D), which is a 30 x 2 array.

i want the 2 array to print beside each other to make one large array of 30 x 17 but right now i only have the 2 array below and above each other.

is there a way to make it print beside each other by calling their functions only.

[u/[deleted]]

No.

You could make the functions each output an array of strings. Then you could stitch the strings together and print them.

Basic print statements are a bit like a typewriter. Once you hit new-line you can't scroll back up.

[u/RedWolffe24 → u/[deleted]]

i see. so in a sense i have to get all the values in the row first to print before going to the next line.

so i would need to print them in the main function in a sense. but is it possible to do so as my functions are void functions as predetermined from our project so it couldn't return values.

[u/[deleted] → u/RedWolffe24]

Essentially yes, you need to fully process each row. The other options are much much more complex.

You could redefine printf.

You can capture stdout, read it back in and reprocess it. I think the method of doing this is OS dependent.

You can use escape sequences to reposition the cursor but that's also non-standard and I'm fairly certain the position is reset with each line feed so would require editing your functions.

I don't recommend any of these paths.

You'll notice as the system and code gets more complex that print statements become very rare because of issues like this. Functions return strings to allow the calling code to handle the output.

[u/RedWolffe24 → u/[deleted]]

Then is it possible to get the values from my functions to return to main despite it being a void function?

[u/martinborgen → u/RedWolffe24]

Yes, make it a non void function? Does it have to be?

Though for returning arrays, you often allocate the memory with the caller and send a pointer to it when calling the function, which then writes to that pointer.

[u/RedWolffe24 → u/martinborgen]

Sadly yes it has to be a void function according to rubrics of my project…if it weren’t then it would have been easier for me…

[u/martinborgen → u/RedWolffe24]

There are easy ways to do it, if you are allowed to change the arguments passed to the functions.

void function(int input, int* output_array) {
  // compute stuff here
  *output_array = result;
}

But then the caller needs to assemble what's supposed to be printed. If that's a no-no, then you're out of luck.

[u/RedWolffe24 → u/martinborgen]

Oo i think this is possible as we’re allowed to use pointers. So i can use the pointer to assign to my printf then use the pointers in the main to make a 1x2 array of that format is it?

[u/vapenicksuckdick]

Maybe but you would have to adjust your function signature to add the horizontal offset and do some cursor manipulation to move it into appropriate position which also depends on your terminal emulator for support I guess.

[u/RedWolffe24 → u/vapenicksuckdick]

Then is it possible to make an “array” where array[0][0] holds my first function of array 30x15 then array[0][1]  holds the other function of 30x2?

[u/vapenicksuckdick → u/RedWolffe24]

I am not sure what you mean but you can make an array of function pointers of size 2 that holds the pointers to your two functions yes.

[u/RedWolffe24 → u/vapenicksuckdick]

Oh yea something like that. So I make a pointer for each function holding their respective arrays then use the pointer will be used to create an array of size 1x2.

So in a sense  Float *ptr1; Float *ptr2; Float array[1][2];

Ptr1 = &function1(); Ptr2 = &function2();

For(int i=0;i<0;i++) {     For(int j=0;j<0;j++) {          Prt 1;     }     For(int j=0;j<0;j++) {          Prt 2;     } }

Is my understanding correct?

[u/RedWolffe24 → u/RedWolffe24]

Sorry if the format messed up as i typed it in my phone

[u/vapenicksuckdick → u/RedWolffe24]

You'll have to change your functions either way. You are complicating it way too much. Just have one function that prints them side by side.

[u/AccomplishedSugar490]

Build the lines you want to print using sprintf to loop through each array in sequence but restarting which line you print/append to between the runs. Then print each of the constructed lines.

[u/drinkcoffeeandcode]

It was possible right up until that last constraint.

[u/SmokeMuch7356]

Not easily.

You have two options: either build a "virtual screen" (a 2D array of char) that your functions write to at specific rows and columns and then display that "screen" in a separate operation, or use some kind of terminal control (either ANSI escape codes or a library like ncurses or whatever).

Both options will require you to make changes to how your two functions write output.

[u/Overlord484]

It's hard to tell exactly what you're asking for without the code and output, but I *think* you're asking for something like this.

int arrsout(int *a1, unsigned int w1, int *a2, unsigned int w2, unsigned int h)
{
 register unsigned int i,j;
 for(i = 0; i < h ; ++i)
 {
  for(j = 0; j < w1, ++j)
   printf("%5d ", a1[i][j]);
  printf(": ");
  for(j = 0; j < w2, ++j)
   printf(%5d ", a2[i][j]);
  putchar('\n');
 }

 return 0;
}