Need help with 2D arrays

[Unregistered]

Ive written a program to transpose a matrix of integers using a 2D array, which works fine. The working model is below:

#include <stdio.h>
#define maxn 10
int main()
{
 char proceed = 'Y';
 int a[maxn][maxn], n, temp, p, q; 
 /* p and q used for row and column array subscripts */
 printf("Program to transpose n*n integer matrix\n\n");
 proceed = 'Y';
 while(proceed == 'Y' || proceed == 'y')
 {
  printf("\nType the order of the matrix (i.e. n) ");
  if(scanf("%d", &n)==1 && n>0 && n<=maxn)
  {	
   printf("\nYour matrix is %d by %d\n\n", n,n);
   printf("\nType in the matrix row by row\n\n");
   for(p=0; p<=n-1; p++)
   {
    printf("Type in row no %d \n", p+1);
    for(q=0; q<=n-1; q++)scanf("%d", &a[p][q]);
   }
   printf("\nThe matrix you have typed in is\n\n");
   for(p=0; p<=n-1; p++)
  {
   for(q=0; q<=n-1; q++)printf("%d ", a[p][q]);
   printf("\n");
  }
   
  /* Matrix Transpose */
  for(p=1; p<=n-1; p++)
  for(q=0; q<p; q++)
 {
  temp = a[p][q];
  a[p][q] = a[q][p];
  a[q][p] = temp;
 };
 printf("\n\nThe transpose is\n\n");
 for(p=0; p<=n-1; p++)
 {
 for(q=0; q<=n-1; q++)printf("%d ", a[p][q]);
 printf("\n");
 }

 }
  else printf("\n\nInvalid input\n\n");
  printf("Would you like to try to transpose another matrix? (Y or N) ");
  proceed=getchar();
  while(proceed !='Y' && proceed !='y' && proceed !='n' && proceed !='N')
  proceed=getchar();
 }
 printf("\nThis program is now ending\n\n");
 return 0;
}

Now, I want to put the main part of the program, the transpose code, into a function on its own. Ive written the following code but it doesnt work. Any suggestions please?

#include <stdio.h>
#define maxn 10

int p, q, n;

void transpose(int* a, int N)
{
 int temp;
 for(p=1; p<=n-1; p++)
  for(q=0; q<p; q++)
 {
  temp = a[p][q];
  a[p][q] = a[q][p];
  a[q][p] = temp;
  };
 printf("\n\nThe transpose is\n\n");
 for(p=0; p<=n-1; p++)
 {
 for(q=0; q<=n-1; q++)printf("%d ", a[p][q]);
 printf("\n");
 }
}

int main()
{
 char proceed = 'Y';
 int a[maxn][maxn]; 
 printf("Program to transpose n*n integer matrix\n\n");
 proceed = 'Y';
 while(proceed == 'Y' || proceed == 'y')
 {
  printf("\nType the order of the matrix (i.e. n) ");
  if(scanf("%d", &n)==1 && n>0 && n<=maxn)
  {	
   printf("\nYour matrix is %d by %d\n\n", n,n);
   printf("\nType in the matrix row by row\n\n");
   for(p=0; p<=n-1; p++)
  {
   printf("Type in row no %d \n", p+1);
   for(q=0; q<=n-1; q++)scanf("%d", &a[p][q]);
  }
  printf("\nThe matrix you have typed in is\n\n");
  for(p=0; p<=n-1; p++)
  {
   for(q=0; q<=n-1; q++)printf("%d ", a[p][q]);
   printf("\n");
  }

  transpose(a, n);

 }
 else printf("\n\nInvalid input\n\n");
 printf("Would you like to try to transpose another matrix? (Y or N) ");
 proceed=getchar();
 while(proceed !='Y' && proceed !='y' && proceed !='n' && proceed !='N')
 proceed=getchar();
 }
 printf("\nThis program is now ending\n\n");
 return 0;
}

[Jubba]

for(p=1; p<=n-1; p++)
for(q=0; q<p; q++)
{
temp = a[p][q];
a[p][q] = a[q][p];
a[q][p] = temp;
};

looks like the first line should read

for (p=0; p<=n-1 ; p++)

that should make it work...

[Unregistered]

The code itself (for statements etc) is ok, as the top one works fine. However im having trouble with this part:

void transpose(int* a, int N)

I know this is what to do for a 1D array, but what about a 2D? It wont compile at the moment.