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C/C++ Users Group Library 1996 July
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C-C++ Users Group Library July 1996.iso
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v_10_06
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1006091a
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1991-09-08
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791b
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43 lines
/* LISTING 6 */
#define DM2init struct DM2 \
{ int rows, cols; double * data; }
#define DM2type struct DM2
DM2init;
DM2type DM2alloc(DM2type *p, int r, int c) {
p->rows = r;
p->cols = c;
p->data = (double *)
malloc((unsigned)r*c*sizeof(double));
return *p;
}
#define DM2item(x,i,j) x.data[i*x.cols+j]
void DM2free(DM2type * x) {
free((void *)x->data);
}
main()
{
DM2type m;
int i,j;
DM2alloc(&m, 7,13);
for(i=0; i<7; ++i)
for(j=0; j<13; ++j)
DM2item(m,i,j) = (double) (i*100)+j;
for(i=0; i<7; ++i) {
for(j=0; j<13; ++j)
printf("%3g ",DM2item(m,i,j) );
printf("\n");
}
DM2free(&m);
}