please help me convert this code to while loop

zodisign · #1 14-Aug-2005, 05:27

i have a code for multiplication table using for loops but i don't know how to convert it to while loops.please help me convert it to while loop statement.thank you.

CPP / C++ / C Code:

void main()
	 {
		  int r,c,number,size;
		  printf("Enter a number:");
		  scanf("%d",&size);

		  for (c = 0; c <= size; c++)
				printf("%3d", c);
		  printf("\n");
		  for (r = 1; r <= size; r++) {
				printf("%3d", r);
				for (c = 1; c <= size; c++)
					 printf("%3d", r*c);
				printf("\n");
		  }
	 }

cable_guy_67 · #2 14-Aug-2005, 06:38

Quote:

Originally Posted by zodisign

... but i don't know how to convert it to while loops...

CPP / C++ / C Code:

  for (c = 1; c <= size; c++)
    printf("%3d", r*c);
  
  printf("\n");

In order to use this loop as a conditional while statement you need to,

Set your pre loop condition ( c = 1 )
Give your while a continue or stop condition ( c <= size )
Prepare for the next loop stop/continue ( c++ )

So the loops you want to create will look something like,

CPP / C++ / C Code:

// you got your size variable
// set your pre condition here
while ( c <= size ) {
  // do what you need to do here
  // prepare for the next loop here
}
// continue on with the program

For the sake of arguement, lets say that the size was 2. When you get to the while... line it asks,
Is c less than or equal to size? If yes, enter the loop. If no, skip it by and get on with the program. When inside the loop, you do what you wanted to do, in your case print out some information. Than you increase your variable that you are checking against size. Lather, Rinse, Repeat...

That should give you an idea of how the construct works. HTH

Mark

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