#include <stdio.h>
#define TAM 10
#define RAND 15
 
int main ()
{	srand (time (0)); int nums [3][TAM], a, b, x, flag;
	for (x=0; x<2; x++) for (a=0; a<TAM; a++)
	{	do
		{	nums [x][a]=rand ()%RAND+1; flag=0;
			for (b=0; b<a; b++) if (nums [x][b]==nums [x][a]) { flag=1; break; }
		}	while (flag == 1);
	}
 
 	for (a=0; a<10; a++) nums [2][a]=nums [0][a]+nums[1][9-a];
	for (a=0; a<10; a++) printf ("Posición %02d --> %02d + %02d = %02d\n", a+1, nums [0][a], nums [1][9-a], nums [2][a]);
	return 0;
}
 

if (a<4.7 || a>5.8)
{
if (a<4.7) printf ("Valor menor de lo permitido\n");
if (a>5.8) printf ("Valor mayor de lo permitido\n");
}
else printf ("Valor correcto\n");
 

#include <stdio.h>
#define TAM 10
#define RAND 20
 
int main ()
{	srand (time (0)); int nums [TAM], a, b, flag;
	for (a=0; a<TAM; a++)
	{	do
		{	nums [a]=rand ()%RAND+1; flag=0;
			for (b=0; b<a; b++) if (nums [b]==nums [a]) { flag=1; break; }
		}	while (flag == 1);
	}
	for (a=0; a<TAM; a++)	printf ("%d ", nums [a]);
	printf ("\n");return 0;
}