while, do while

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

int main (int argc, char **argv)
{

    int x, count;

printf("(1)\n----------\n");

    x = 8;

    while(x){
        printf("%d ", x);
        x--;
    }

    printf("\n");

    x = 8;
    count = 0;

    while(x){
        x--;
        printf("%d ", x);
        count ++;
    }

    printf("\ncount: %d\n",count);

printf("\n(2)\n----------\n");

    x = 8;
    count = 0;

    while(x--){
        printf("%d ", x);
        count ++;
    }

    printf("\ncount: %d\n",count);

printf("\n(3)\n----------\n");

    x = 8;
    count = 0;

    while(--x){
        printf("%d ", x);
        count ++;
    }

    printf("\ncount: %d\n",count);


printf("\n(4a)\n----------\n");

    x = 8;
    count = 0;
    int i = 0;

    while(i<x){
        printf("%d ", i);
        i++;
        count ++;
    }

    printf("\ncount: %d\n",count);

printf("\n(4b)\n----------\n");

    x = 8;
    count = 0;
    i = 0;

    while(i<=x){
        printf("%d ", i);
        i++;
        count ++;
    }

    printf("\ncount: %d\n",count);

printf("\n(5)\n----------\n");

    x = 8;

    do{
        printf("%d ", x);
        x--;
    }while(x);

    printf("\n");

    x = 8;
    count = 0;

    do{
        x--;
        printf("%d ", x);
        count ++;
    }while(x);

    printf("\ncount: %d\n",count);

printf("\n(6)\n----------\n");

    x = 8;
    count = 0;

    do{
        printf("%d ", x);
        count ++;
    }while(--x);

    printf("\ncount: %d\n",count);

printf("\n(7)\n----------\n");

    x = 8;
    count = 0;

    do{
        printf("%d ", x);
        count ++;
    }while(x--);

    printf("\ncount: %d\n",count);

printf("\n(8a)\n----------\n");

    x = 8;
    count = 0;
    i = 0;

    do{
        printf("%d ", i);
        i++;
        count ++;
    }while(i<x);

    printf("\ncount: %d\n",count);

printf("\n(8b)\n----------\n");

    x = 8;
    count = 0;
    i = 0;

    do{
        printf("%d ", i);
        i++;
        count ++;
    }while(i<=x);

    printf("\ncount: %d\n\n",count);

return 0;
}

/*

output:

(1)
----------
8 7 6 5 4 3 2 1
7 6 5 4 3 2 1 0
count: 8

(2)
----------
7 6 5 4 3 2 1 0
count: 8

(3)
----------
7 6 5 4 3 2 1
count: 7

(4a)
----------
0 1 2 3 4 5 6 7
count: 8

(4b)
----------
0 1 2 3 4 5 6 7 8
count: 9

(5)
----------
8 7 6 5 4 3 2 1
7 6 5 4 3 2 1 0
count: 8

(6)
----------
8 7 6 5 4 3 2 1
count: 8

(7)
----------
8 7 6 5 4 3 2 1 0
count: 9

(8a)
----------
0 1 2 3 4 5 6 7
count: 8

(8b)
----------
0 1 2 3 4 5 6 7 8
count: 9

*/