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2-dimensional array of structure

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[quote][i]Originally posted by pierremx[/i]
[br]Origin Ver. and Service Release (Select Help-->About Origin): 7.5 / 8
Operating System: XP

I needed to use 2 dimensional arrays in Origin C. 
The multidimensional C array type notation Tab[x][y] don't work in origin C.
Below, my solution.

Do you have another solutions?

#include <Origin.h>

struct stTemp
{
	int a;
	int b;
};

void test(struct stTemp **tt)
{
	int i,j;
	struct stTemp *ptr = NULL;
	
	// Initialize b member of array
	for (i = 0; i < 3; ++i)
	{
		ptr = *(tt + i);
		for (j = 0; j < 2; ++j)
			ptr[j].b = i * 200 + j;
	}
	
	
	// Show all the array
	for (i = 0; i < 3; ++i)
	{
		ptr = *(tt + i);
		
		for (j = 0; j < 2; ++j)
			printf("  (%i,%i) [a] = %i  [b]= %i ", i,j,ptr[j].a,ptr[j].b);
		printf("\n");
	}
}

void main()
{
	// 2 dimensional array of structure
	// t[3][2]
	
	struct stTemp *t[3];
	struct stTemp t0[2];
	struct stTemp t1[2];
	struct stTemp t2[2];
	
	t[0] = &t0[0];
	t[1] = &t1[0];	
	t[2] = &t2[0];	
	
	// initialize a member of array
	t[0][0].a = 1;t[0][1].a = 10;
	t[1][0].a = 2;t[1][1].a = 20;
	t[2][0].a = 3;t[2][1].a = 30;
	
	// initialize b member of array and show it 
	test(&t[0]);
}

Regards,
Pierre.

[/quote]

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T O P I C R E V I E W
pierremx	Posted - 03/12/2009 : 5:11:21 PM Origin Ver. and Service Release (Select Help-->About Origin): 7.5 / 8 Operating System: XP I needed to use 2 dimensional arrays in Origin C. The multidimensional C array type notation Tab[x][y] don't work in origin C. Below, my solution. Do you have another solutions? #include <Origin.h> struct stTemp { int a; int b; }; void test(struct stTemp *tt) { int i,j; struct stTemp ptr = NULL; // Initialize b member of array for (i = 0; i < 3; ++i) { ptr = (tt + i); for (j = 0; j < 2; ++j) ptr[j].b = i 200 + j; } // Show all the array for (i = 0; i < 3; ++i) { ptr = (tt + i); for (j = 0; j < 2; ++j) printf(" (%i,%i) [a] = %i [b]= %i ", i,j,ptr[j].a,ptr[j].b); printf("\n"); } } void main() { // 2 dimensional array of structure // t[3][2] struct stTemp t[3]; struct stTemp t0[2]; struct stTemp t1[2]; struct stTemp t2[2]; t[0] = &t0[0]; t[1] = &t1[0]; t[2] = &t2[0]; // initialize a member of array t[0][0].a = 1;t[0][1].a = 10; t[1][0].a = 2;t[1][1].a = 20; t[2][0].a = 3;t[2][1].a = 30; // initialize b member of array and show it test(&t[0]); } Regards, Pierre.
2 L A T E S T R E P L I E S (Newest First)
pierremx	Posted - 03/13/2009 : 10:46:46 AM Hi cpyang, Yes, it is a good idea! In Origin 8, there is the "Array" possibility (search array in the help) but I don't directly understand how to use it. Regards, Pierre.
cpyang	Posted - 03/12/2009 : 8:35:00 PM You can use pointer and store into a matrix, as shown below: struct stTemp { int a; int b; }; void test() { stTemp* pst; matrix<uint> mu(3,4); int ii, jj; for(ii = 0; ii < mu.GetNumCols(); ii++) { for(jj = 0; jj < mu.GetNumRows(); jj++) { pst = new stTemp; pst->a = (jj+1)10; pst->b = ii+1; mu[jj][ii] = (uint)pst; } } for(ii = 0; ii < mu.GetNumCols(); ii++) { for(jj = 0; jj < mu.GetNumRows(); jj++) { pst = (stTemp)mu[jj][ii]; printf("mu[%d][%d], a=%d, b=%d\n", jj, ii, pst->a, pst->b); } } //cleanup for(ii = 0; ii < mu.GetNumCols(); ii++) { for(jj = 0; jj < mu.GetNumRows(); jj++) { pst = (stTemp*)mu[jj][ii]; delete pst; mu[jj][ii] = 0; } } } Best will be to put the new and delete code inside a class so that you can manage the 2D pointers with constructor/destructors.

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