Something

#include <stdio.h>
#include <math.h>
int a; //kintamasis, kuris nurodo kiek bus ivesta staciakampiu
int i; //masyvo narys
float ord [100]; //x masyvas
float abc [100]; //y masyvas
float ilgis [100]; //lygiagretainio atstumo iki koordinaciu pradzios tasko masyvas
int b;

void main ()

{abc:
int z;
z=5;
	printf ("Kiek ivesite staciakampiu \n");
	scanf ("%d", &a);

	for (i=0; i<=a-1; i++)
		 printf ("ieskite staciakampio vieno is kampu x koordinate\n") && scanf ("%f",&ord [i]);
	
	for (i=0; i<=a-1; i++)
		 printf ("ieskite staciakampio vieno is kampu y koordinate\n") && scanf ("%f",&abc [i]);

	for (i=0; i<=a-1; i++)
		ilgis[i]=sqrt(ord[i]*ord[i]+abc[i]*abc[i]);

	for (i=0; i<=a-1; i++)
		printf ("%3.2f\n", ilgis[i]);
i==0;
b==0;
	while (i<=a-1)
	{if (b<ilgis [i])
	b==ilgis[i];
	else 
		ilgis[i]=ilgis[i];}
	printf ("%3.2f",b);







printf ("jei norite testi spauskite 1, jei ne spauskite 0\n");
scanf ("%d", &z);

if (z==1)
goto abc;
}