c primer plus 第五版 的源代码

				/* join_chk.c -- joins two strings, check size first */
				#include 
				#include 
				#define SIZE 30
				#define BUGSIZE 13
				int main(void)
				{
				    char flower[SIZE];
				    char addon[] = "s smell like old shoes.";
				    char bug[BUGSIZE];
				    int available;
				
				    puts("What is your favorite flower?");
				    gets(flower);
				    if ((strlen(addon) + strlen(flower) + 1) 				        strcat(flower, addon);
				    puts(flower);
				    puts("What is your favorite bug?");
				    gets(bug);
				    available = BUGSIZE - strlen(bug) - 1;
				    strncat(bug, addon, available);
				    puts(bug);
				   
				    return 0;
				}