#include <stdio.h>
 
int compar(const void *pa, const void *pb)
{
	size_t a = strlen(*(char**)pa);
	size_t b = strlen(*(char**)pb);
	if (a > b) return -1;
	if (a < b) return 1;
	return 0;
}
 
int main(void) 
{
	char* a[] = {"1. hello world",
	             "2. john doe at the bay watch",
                 "3. Great Heavens",
                 "4. altair",
                 "5. Jim and Jamy"};
 
    for (int i=0; i<5; ++i) puts(a[i]);
 
	qsort(a, 5, sizeof a[0], compar);
 
    puts("-----------------------------------");
 
    for (int i=0; i<5; ++i) puts(a[i]);
 
	return 0;
}
 

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