vim vertical line at 80 characters
#include <stdio.h>
#define MAX_LINE_LENGTH 80
int main() {
int c;
int char_count = 0;
while ((c = getchar()) != EOF) {
if (c == '\n') {
char_count = 0;
putchar(c);
} else {
putchar(c);
char_count++;
if (char_count == MAX_LINE_LENGTH) {
putchar('\n');
char_count = 0;
}
}
}
return 0;
}