/* copies s into d till the last whitespace is reached returning
number of characters copied. */
int fold(char s[], char d[]){
int length = 0;
while(s[length] != '\0'){
++length;
}
int i;
for (i = 0; i < LINE_LENGTH; ++i){
d[i] = s[i];
}
if(s[i] != '\0'){
d[findblnk(d, i, -i)] = '\n';
}
return i;
}
int main(){
int c, pos;
pos = 0;
while( (c = getchar()) != EOF){
line[pos] = c;
if( c == '\t')
pos = exptab(pos);
else if( c == '\n'){
printl(pos);
pos = 0;
} else if(++pos >= MAXCOL){
pos = findblnk(pos);
printl(pos);
pos = newpos(pos);
}
}
}