#include <stdio.h>
#include <stdlib.h>

void ss()
{
	printf("\t\t\t\tSelection Screen\n\n");
	printf("1 - Polynomial Evaluation\n");
	printf("2 - Statistical Algorithm\n");
	printf("3 - Matrix Operations\n");
	printf("4 - Exit\n\n");
}

void polynomialEval()
{
	int poly[10],n=0,i=0;
		printf("\nhow many input:");
			scanf("%d",&n);
			if(n>10)
				printf("Error: Only maximum of 10 inputs");
			else if(n<0)
				printf("Error: value must be greater than zero");
			else{
				for(i=0; i<n;i++)
				{
					printf("\nEnter poly[%d]=",i);
					scanf("%d",&poly[i]);
				}
			}

			for(i=0;i<n;i++)
			{
				printf("%dx^%d",poly[i],i);
				if(i<n-1)
				printf("+");
			}
			printf("\n\n\n");
}

void statisticalAlgo()
{
	int num=0;
	printf("1-mean\n");
	printf("2-standard deviation\n");
	printf("3-summation\n");
	printf("Choose a number: ");
	scanf("%d",&num);

	if(num==1)
	{

	}
	else if(num==2)
	{

	}
	else

}

int main(){

int num=0;

do{
	ss();
	scanf("%d",&num);
	switch(num)
	{
		case 1:	system("cls");
				polynomialEval();
				break;

		case 2: system("cls");

				printf("\n\ncase 2\n\n");
				break;

		case 3: system("cls");
				printf("\n\ncase 3\n\n");
				break;
		case 4: printf("Bye. Thank you");
				exit(0);
				break;
		}
}while(num!=4);

	system ("PAUSE");
return 0;
}