What is an easy way to write a C program for creating a table using for loops?

[Dili]

I need to write a c program to get a table like this
______0 ________1 _________2________3 ...(underscore for presentation only)
10 sqrt(0*10) sqrt(1*10)
11
12
..
..

i know how to get the first row while saving it in an array.
but i can't find how to write the rest of the lines.
is tehre a easy way using only for loops?
here is a part of the code I've written

#include<stdio.h>
#include<math.h>
int main()
{
int i,j,num[20];
printf("\t");
for(i=0;i<9;i++)


num=i;
{
printf("%d\t",num);
}

 

[mgb_phys]

What are you trying to achieve ?
Draw out on paper ( or in excel) what you want in each cell.
Work out what formula calcualtes these numbers
Write the two loops ( one to loop over columns and one over rows)

 

[SlideMan]

Not sure why you'd need to use an array to store your values, unless you plan to use them later. Even if you were doing that, wouldn't a 2D array make more sense? Then, the easiest way would be to create a large enough array so that you just ignore the first 10 rows. Then, assuming rows = i and cols = j, you can do

num[j] = sqrt(i*j)

in a nested for loop. Use some simple arithmetic if you don't want to waste space in the array.

I think this should get you what you're after (at least without writing the program for you).

 

[SlideMan]

Assuming this is the table you want...

[FONT="Courier New"]
    |      0       |      1       |       2      |     3
-----------------------------------------------------------
10  |  sqrt(0*10)  |  sqrt(1*10)  |  sqrt(2*10)  |
11  |  sqrt(0*11)  |  sqrt(1*11)  |  sqrt(2*11)  |
12  |  sqrt(0*12)  |  sqrt(1*12)  |  sqrt(2*12)  |
13  |

 

[jim mcnamara]

This looks like homework, so I would suggest:
1. your prof wants you to learn about printf() formatting specifically how to make a field a fixed width - eg printf("%6.3f", sqrt( of something) );
2. your prof wants you to see that you can sprintf the same way as printf, except to build a string, not print right away.
3. you can use a for( ) loop to build the body of the table.