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#include<stdio.h>
#define MAXLENGTH 1000
int get_line(char line[], int maxlength);
void strip_line(char line[], int length);
void copy(char to[], char from[]);
/*
* MAIN
* Removes all trailing whitespace and blank lines from STDIN.
*/
int main() {
int len; // current line length
char line[MAXLENGTH]; // current input line
while ((len = get_line(line, MAXLENGTH)) > 0) {
strip_line(line, len);
if (line[0] != '\0')
printf("%s\n", line);
}
return 0;
}
/*
* GET_LINE
* Read STDIN into LINE up to MAXLENGTH and return its length.
* Returns the length of a the line.
*/
int get_line(char line[], int maxlength) {
int c, i;
for (i = 0; i < maxlength - 1 && (c = getchar()) != EOF && c != '\n'; ++i)
line[i] = c;
if (c == '\n') {
line[i] = c;
++i;
}
line[i] = '\0';
return i;
}
/*
* STRIP_LINE
* Remove all whitespace from end of LINE of given LENGTH.
*/
void strip_line(char line[], int length) {
int i, c;
for (i = --length; i >= 0; --i) {
c = line[i];
if (c == ' ' || c == '\t' || c == '\n')
line[i] = '\0';
else
break;
}
}
/*
* COPY
* Copy FROM into TO; assume TO is big enough.
*/
void copy(char to[], char from[]) {
int i;
i = 0;
while ((to[i] = from[i]) != '\0')
++i;
}
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