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Exercise 1-19. Write a function reverse(s)

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This commit is contained in:
Kris Lamoureux 2021-12-02 20:29:00 -05:00
parent c6070adb67
commit da9de48bac
Signed by: kris
GPG Key ID: 3EDA9C3441EDA925
1 changed files with 16 additions and 4 deletions
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20
14-char-arrays.c
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@ -1,10 +1,11 @@
#include <stdio.h> #include <stdio.h>
#define MAXLINE 1000 /* maximum input line size */ #define MAXLINE 1000 /* maximum input line size */
#define MINLINE 81 #define MINLINE 0
int getline(char line[], int maxline); int getline(char line[], int maxline);
void copy(char to[], char from[]); void copy(char to[], char from[]);
void trim(char line[], int len); void trim(char line[], int len);
void reverse(char to[], char from[], int len);
/* print longest input line */ /* print longest input line */
main() main()
@ -13,7 +14,7 @@ main()
int max; int max;
int c; int c;
char line[MAXLINE]; char line[MAXLINE];
char longest[MAXLINE]; char enil[MAXLINE];
max = 0; max = 0;
while((len = getline(line, MAXLINE)) > 0) { while((len = getline(line, MAXLINE)) > 0) {
@ -24,8 +25,8 @@ main()
++len; ++len;
} }
if (len >= MINLINE) { if (len >= MINLINE) {
trim(line, len); reverse(enil, line, len);
printf("%s", line); printf("%s", enil);
} }
} }
return 0; return 0;
@ -67,3 +68,14 @@ void trim(char s[], int len)
else else
return; return;
} }
void reverse(char to[], char from[], int len)
{
int i;
i = 0;
while ((to[i] = from[len-1]) != '\0') {
++i;
--len;
}
}