Java programming

Question

ip = 11,12,13,14,15,16,17,18,19,20 // as a String

op

11

12 15

13 16 18

14 17 19 20

Answer 1

Here is one answer. It works for this very specific case, but could probably be expanded to a more generic use case. To make things easier, I just hard-coded the input rather than try to read it in from a file or type it in each time. Either option would be fairly easy to implement, but would require more code and then various error checking to make sure the input was the right length, type, etc.

I created the output sideways to make it easier to loop through the input string and save it in the output string. This saved having to implement various formulas and if statements to calculate the input and output positions When printing, it is a simple matter of two loops for printing the output.

public class App {

public static void main(String[] args) throws Exception {

int mysub = 0; int mincol=0;int maxcol=3;

int maxrow=4; int outloop=0; int inloop=0;

String[] instring = {"11","12","13","14","15","16","17","18","19","20"};

String[][] outstring= new String[maxrow][maxrow];

for(outloop = 0;outloop<= maxrow; outloop++ )

{

for( inloop = mincol;inloop <=maxcol; inloop++ )

{

//System.out.println(instring[mysub]);

outstring[inloop][outloop] = instring[mysub];

mysub++;

}

mincol++;

}

for(outloop = 0;outloop< maxrow; outloop++ )

{

for( inloop = 0;inloop <maxrow; inloop++ )

{

if(outstring[outloop][inloop] != null)

{System.out.print(outstring[outloop][inloop] + " ");}

}

System.out.println("");

}

}

}