Mine

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <conio.h>
#include <malloc.h>
#include <string.h>

int main(void)
{
	int e,meg,*array,e1,key,key1;

	printf("Parakalo doste mia epithimiti epilogi(1-9): \n 1. Dimiourgia Pinaka\n 2. Sosimo pinaka se arxeio\n 3. Diabasma pinaka apo arxeio\n 4. Emfanisi pinaka\n 5. BubbleSort\n 6. InsertionSort\n 7. QuickSort1\n 8. QuickSort2\n 9. QuickSort3\n 0. Exodos\n \nEpilogi:");
	scanf("%d",&e);

	while(key==0){

		if(e==1){
			printf("Parakalo eisagete to megethos tou pinaka: ");
			scanf("%d",&meg);
			array=malloc(meg * sizeof(int));
			printf("Doste epithimito tropo arxikopoiisis: \n 1. Ataxinomitos\n 2. Sxedon taxinomimenos\n Epilogi:");
			while(key1==0){
				scanf("%d",&e1);
				if(e1==1){
					key1=1;
							}
				else if(e1==2){
					key1=1;
								}
				else printf("Akiri epilogi , doste mia epilogi apo 1-2:\n"); key1=0;
							}
			key=1;
					}
				
		else if(e==2){
			key=1;
						}
		else if(e==3){
			key=1;
						}
		else if(e==4){
			key=1;
						}
		else if(e==5){
			key=1;
						}
		else if(e==6){
			key=1;
						}
		else if(e==7){
			key=1;
						}
		else if(e==8){
			key=1;
						}
		else if(e==9){
			key=1;
						}
		else if(e==0){
			key=1;
						}
		else printf("Akiri epilogi , doste mia epilogi apo 1-9:\n"); key=0;
		}
}