-
Notifications
You must be signed in to change notification settings - Fork 0
/
Exercise1-19.c
55 lines (46 loc) · 1.07 KB
/
Exercise1-19.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
/*Exercise 1-19. Write a function reverse(s) that reverses the
character string s. Use it to write a program that reverses its
input a line at a time.*/
#include <stdio.h>
#define MAXLINE 5000 /* maximum input line length */
int get_line(char line[], int maxline);
void reverse(char s[]);
/* print the longest input line */
main()
{
int len; /* current line length */
char line[MAXLINE]; /* current input line */
while ((len = get_line(line, MAXLINE)) > 0)
if (len > 0)
{
reverse(line);
printf("%s",line);
}
return 0;
}
/* getline: read a line into s, return length */
int get_line(char s[],int lim)
{
int c, i;
for (i=0; i < lim-1 && (c=getchar())!=EOF && c!='\n'; ++i)
s[i] = c;
if (c == '\n') {
s[i] = c;
++i;
}
s[i] = '\0';
return i;
}
void reverse(char s[])
{
int size=0;
while(s[size]!='\0')
++size;
char temp;
for(int i=size-2,j=0 ; i>=size/2; i--,j++ )
{
temp=s[j];
s[j]=s[i];
s[i]=temp;
}
}