#include <stdio.h>
#include <string.h>
#define MAXLINE 100
void encrypt(char *);
int main(void)
{
char line[MAXLINE];
printf("input the string:");
gets(line);
encrypt(line);
printf("%s%s\n","after being encrypted:",line);
return 0;
}
void encrypt (char*s)
{
for(;*s!='\0';s++)
if(*s=='z')
*s = 'a';
else
*s = *s + 1;
}
第三行 #define MAXLINE 100是什么意思,有什么作用