How do I print the row and column number in an array????

**chad03** · 07-13-2003

I'm looking to modify my function for a 10 x 20 array that finds the max value in the array. I'm trying to print the row and column number of the element that is the max value but I always get 10 and 20 no matter where the max value is. Can someone help me figure out why or point me to another thread. I searched but couldn't find anything pertaining to this topic. I modified it for a smaller array until I get it figured out.

Here's the code:

#include <stdio.h>
void findmax(int[2][20];
int main()
{
int numbers[2][20] = {1,4,5,8,3,2,15,227,45,87,6,92,23,21,45,85,95,187, 34,67,56,4,2,7,0,9,6,78,94,300,486,867,917,45,1,66 6,911,56,41,35};

findmax(numbers);
return 0;
}

void findmax(int num[2][20])
{
int i,j,max;
for(i=0;i<2;i++)
for (j=0;j<20;j++)
if (num[i][j] > max)
max = num [i][j];
printf("\nThe maximum array value is %d\n",max);
return;
}

**XSquared** · 07-13-2003

Use code tags.

All you need to do is have ti store the row and column of the maximum value when you find it.

Code:

max = num [i][j];
maxrow = i;
maxcol = j;

**Draco** · 07-13-2003

all you'd have to do is after your first printf statement make another that uses i and j.

Code:

printf("Max found in array element [%d][%d]",i+1,j+1);

**XSquared** · 07-13-2003

Originally posted by Draco
all you'd have to do is after your first printf statement make another that uses i and j.

Code:

printf("Max found in array element [%d][%d]",i+1,j+1);

That wouldn't work, because i and j are out of scope by then.

**Draco** · 07-13-2003

I don't see why he couldn't put that statement in the findmax function

**XSquared** · 07-13-2003

Here's the code indented properly:

Code:

#include <stdio.h>
void findmax(int[2][20];
int main()
{
  int numbers[2][20] = {1,4,5,8,3,2,15,227,45,87,6,92,23,21,45,85,95,187,
			34,67,56,4,2,7,0,9,6,78,94,300,486,867,917,45,1,66
			6,911,56,41,35};

  findmax(numbers);
  return 0;
}

void findmax(int num[2][20])
{
  int i,j,max;
  for(i=0;i<2;i++)
    for (j=0;j<20;j++)
      if (num[i][j] > max)
	max = num [i][j];
  printf("\nThe maximum array value is %d\n",max);
  return;
}

Now do you see why it wouldn't work?

**Draco** · 07-13-2003

yeah. It's confusing when they don't put in loop braces....I didn't even know you could do that.

**XSquared** · 07-13-2003

If you don't use braces, it will only include the next line of code in the loop/if statement/whatever.

**Draco** · 07-13-2003

I know that..but I thought for loops needed them.

**XSquared** · 07-13-2003

Nope.

**chad03** · 07-13-2003

Thanks for the help Xsquared.

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