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#include <stdio.h>
#define MINLENGTH 80
int main() {
// longline is used as a boolean that tells us if it's a line worth printing
int longline = 0;
// len is simply a character counter, while c is the character itself.
int len, c;
char buffer[MINLENGTH];
while ((c = getchar()) != EOF) {
buffer[len] = c;
/* When we meet the end of the line, we need to print the rest of the line,
but only if we're already in a long line. Otherwise, reset our state.
*/
if (c == '\n') {
if (longline == 1 && len < MINLENGTH - 1) {
buffer[len + 1] = '\0';
printf("%-s", buffer);
}
len = 0;
longline = 0;
continue;
}
/* When the buffer has filled up, output its contents! */
if (len == MINLENGTH) {
buffer[len + 1] = '\0';
printf("%-s", buffer);
len = 0;
longline = 1;
continue;
}
/* If neither of the above cases are caught, increment our counter and fetch
more data.
*/
++len;
}
return 0;
}
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