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#include <stdlib.h>
#include <stdio.h>
static float get_f (void)
{
char s[16];
fgets (s, sizeof s, stdin);
return (float) strtod (s, NULL);
}
/* Creation matrice */
float **cree_mat (int n)
{
float **tab = malloc (n * sizeof *tab);
if (tab != NULL)
{
int i;
for (i = 0; i < n; i++)
{
tab[i] = malloc (n * sizeof *tab[i]);
if (!tab[i])
{
for (; i >= 0; i--)
{
free (tab[i]);
}
free (tab), tab = NULL;
break;
}
}
}
return tab;
}
/* suppression matrice */
void del_mat (float **tab, int n)
{
if (tab != NULL)
{
int i;
for (i = 0; i < n; i++)
{
free (tab[i]);
}
free (tab);
}
}
/* Saisie d'une matrice par l'utilisateur */
void fill_mat (float **tab, int n)
{
if (tab != NULL)
{
int i;
for (i = 0; i < n; i++)
{
int j;
for (j = 0; j < n; j++)
{
printf ("saisir nombre reel \n");
tab[i][j] = get_f ();
}
}
}
}
void aff_mat (float *const*tab, int n)
{
if (tab != NULL)
{
int i;
printf ("matrice %d x %d\n", n, n);
for (i = 0; i < n; i++)
{
int j;
for (j = 0; j < n; j++)
{
printf ("%5.2f", tab[i][j]);
}
printf ("\n");
}
printf ("\n");
}
}
/* Transposee matrice */
void trans_mat (float **tab, int n)
{
int i;
for (i = 0; i < n; i++)
{
int j;
for (j = 0; j < n; j++)
{
float tmp = tab[i][j];
tab[i][j] = tab[j][i];
tab[j][i] = tmp;
}
}
}
int main (void)
{
int n = 3;
float **mat = cree_mat (n);
if (mat != NULL)
{
fill_mat (mat, n);
aff_mat (mat, n);
printf ("transpose\n");
trans_mat (mat, n);
aff_mat (mat, n);
del_mat (mat, n);
}
return 0;
} |
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