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#include <stdio.h>
#define MAXLINELENGTH 9001
int get_line(char s[], int limit) {
int c, i;
for (i = 0; i < limit && (c = getchar()) != EOF && c != '\n'; ++i) {
s[i] = c;
}
s[i] = '\0';
/* If I don't include this check, I can't handle blank lines */
if (c == EOF && i == 0) {
return -1;
} else {
return i;
}
}
/* Directly reverse a line's contents. */
void reverse(char input[], int size) {
int tmp;
int i = 0;
size--;
/* If len and i are the same, then there's no reason to proceed */
while (size > i) {
// Store the first character in a temporary spot...
tmp = input[i];
// ... and swap!
input[i] = input[size];
input[size] = tmp;
// Bring our numbers closer together
++i;
--size;
}
}
int main(void) {
// An int and a string to store each line's data in
int line_len;
char buffer[MAXLINELENGTH];
while ((line_len = get_line(buffer, MAXLINELENGTH)) != -1) {
reverse(buffer, line_len);
printf("%s\n", buffer);
}
return 0;
}
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