Solution for Exercise 19-20

ex1920

#include <stdio.h>

int main()
{
    char *fruit[] = {
        "watermelon",
        "banana",
        "pear",
        "apple",
        "coconut",
        "grape",
        "blueberry"
    };
    int x,a;

    for(x=0;x<7;x++)
    {
        a=0;
        while(putchar(*(*(fruit+x)+a++)))
            ;
        putchar('\n');
    }

    return(0);
}

Notes

* I managed to squeeze the entire while loop operation into Line 19. It didn't have to look that way, of course, and it's really a mess. Here's how it could spread out:

while(putchar(*(*(fruit+x)+a))) a++;

All I did was move the increment of variable a down a line. That still leaves the *(*(fruit+x)+a) monster in the putchar() function. You could pull that down as well, though it doesn't make the code any easier to read:

while(*(*(fruit+x)+a)) { putchar(*(*(fruit+x)+a)); a++; }

* Don't fret if you didn't get this solution. This exercise wasn't an easy one. Worse: This type of solution doesn't often find itself into "real" C programs. It's just easier to use printf() to display the strings.

Exercise ex1921 →