Program for AVERAGE and FACTORIAL

Please give the program code of this problems:

1. Enter a number (x) and get the average of all numbers from 1 to x.
2. Enter a number (x) and print the factorial of the number.
Program will look like this:
Enter value: 4
4 24
-Exit when the value entered is zero (0).
factorial = (n)*(n-1)*(n-2)
ex: 4!=4*3*2*1

* I dont have any clue on number 2 on how to do it.
*This two numbers need a loop (for).
* I tried number 1 but it's not right, anyway here is the program code i did:

Code:

#include <stdio.h> 
#include <conio.h> 
int main() 
{ 
int x,y; 
float z; 
clrscr(); 
printf ("\nEnter a number:\t"); 
scanf ("%d",&x); 
for (y=z;y>0;y--); 
z=(y+z)/(x); 
printf ("\n\nThe average of all numbers from 1 to %d is %f",x,z); 
getch(); 
return(0); 
} 

*THANKS in advance.

 

exercise 1

Code:

#include <stdio.h>

int main(){
    int x[COLOR=Red]=0[/COLOR],y[COLOR=Red]=0[/COLOR];
    float z[COLOR=Red]=0[/COLOR];[COLOR=Red]//always initialize variables in the beginning[/COLOR]
    [COLOR=Red]while (x<=0){//number must be greater or equal to 1[/COLOR]
        printf ("\nEnter a number:\t");
        scanf ("%d",&x);[COLOR=Red]getchar();//always after a scanf[/COLOR]
    [COLOR=Red]}[/COLOR]
    [COLOR=Red]for (y=1;y<=x;y++)
        z+=y;//use the for loop from 1 to given number,store the total sum of these numbers in z[/COLOR]
    [COLOR=Red]z/=x;//after exiting the loop divide result with total numbers[/COLOR]
    printf ("\n\nThe average of all numbers from 1 to %d is %f",x,z);
    getch[COLOR=Red]ar[/COLOR]();
    return 0;

 

thanks

 

for the factorial send the code you tried to help you.