1.

/*Erg8_1.c : Kataskeyh synarthshs ypologismou ypervolikou hmitonou
 * Eisagwgh dedomenwn mesw synarthshs 
 *
 * PROSOXH STO LOGIKO VROGXO while POU EPANALAMVANEI THN EISAGWGH
 * DEDOMENWN MEXRI NA STAMATHSEI ME 0                            */

#include <stdio.h>
#include <math.h>

double my_sinh(double x1);
void read_input(double *x2);

int main(void)
{
	int n=1; /*Akeraios deikths pou xrhsimopoieitai gia na stamathsei
		   o vrogxos while otan to n ginei 0*/
	double x, z1, z2;

	printf("YPOLOGISMOS TOY YPERVOLIKOY HMITONOY\n");
	
	while(n)  /*Logikos vrogxos while*/
	{
		read_input(&x);
		z1 = my_sinh(x);
		z2=sinh(x);
		printf("----------------------------------------\n");
		printf("            sinh(%lf)\n", x);
		printf("Ypervoliko\tYpervoliko\n");
		printf("Hmitono\t\tHmitono\n");
		printf("mesw C\t\tme dikia mou\n");
		printf("       \t\tsynarthsh\n");
		printf("%-10.5lf\t%-10.5lf\n\n\n", z1, z2);

		printf("Thelete na ypologisete kai "
			"gia allh timh tou x\?"
			" Ean nai, plhktrologhste 1,"
			" gia eksodo plhktrologhste 0\n");
		scanf("%d",&n);
		/*Ean n=0 tote automata vgainoume apo ton vrogxo while*/
		printf("\n\n");
	}

	return 0;
}


double my_sinh(double x1)
{
	double my_sinh1;

	my_sinh1 = ( exp(x1)-exp(-x1) )/2.0;
	return (my_sinh1);
}
				
void read_input(double *x2)
{
	printf("Dwste to orisma gia ton ypologismo\n");
	scanf("%lf",&*x2);
	return;
}

2.

/*Erg8_2.c Askhsh ypologismou megistou metaksy 3 akeraiwn arithmwn
 * Akeraia synarthsh max3 gia ypologismo megistou*/

#include <stdio.h>

int max3(int i, int j, int k);

int main(void)
{
	int a, b, c, max_no;
	printf("Dwste 3 akeraious arithmous\n");
	scanf("%d %d %d", &a, &b, &c);
	max_no = max3(a, b, c);
	printf ("O megistos metaksy twn %d, %d, %d einai"
		 "o %d\n", a, b, c, max_no);
	return 0;
}

int max3(int i, int j, int k)
{
	int max;

	if (i>j && i>k)
	   max = i;
	else if (j>i && j>k)
	   max = j;
	else if (k>i && k>j)
	   max = k;
	else /*kapoioi einai isoi metaksy toys*/
	{
	 if (i==j && i==k) /*oloi isoi metaksy tous*/
	     max = i;
	 else /*den einai oloi isoi metaksy tous, duo toulaxiston
	        omws einai                                       */
	 {
	    if (i==j)
	    { 
	      if (i>k) 
		    max = i;
	      else
		    max = k;
	    }
	    else if (i==k)
	    { 
	      if (i>j) 
		    max = i;
	      else
		    max = j;
	    }
	    else /*h monadikh enapomeinousa peristwsh, j=k*/
	    { 
	      if (i>k) 
		    max = i;
	      else
		    max = k;
	    }
	 }  /*telos elegxou periptwshs pou dyo apo toys treis einai isoi*/

        }   /*Telos elegxou periptwshs pou TOYLAXISTON 2 einai isoi metaksy tous   */

	return (max);
}