int main(int argc, char* argv[]){
extern char reverse;
extern compare pf;
short c;
int index;
int lineno;
int linelen;
char number;
char line[LINE_LIMIT];
char* lines[LINE_NUMBER];
number = 0;
while(--argc > 0 && (*++argv)[0] == '-'){
while( (c=*++argv[0]) ){
switch(c){
case 'r':
{ reverse = 1; break;}
case 'n':
{ number = 1; break;}
default:
{ printf("invalid flag\n"); break;}
}
}
}
if(argc != 0){
printf("Usage: sort -r -n\n");
}
if(number == 1){
pf = cmpnumber;
}
lineno = 0;
while( (linelen = getnewline(line, LINE_LIMIT)) ){
lines[lineno] = memalloc(linelen + 1);
strcpy(*(lines+lineno++), line);
}
quicksort(lines, 0, lineno-1);
for(index=0; index<lineno; index++){
printf(number == 1? "%s\n" : "%s", lines[index]);
}
return 0;
}
int main(int argc, char* argv[]){
short c;
int lineno;
int except, number, found;
char line[LINE_LIMIT];
lineno = 0;
except = 0;
number = 0;
found = 0;
while(--argc > 0 && (*++argv)[0] == '-'){
while( (c = *++argv[0]) ){
switch(c){
case 'x':
{ except = 1; break;}
case 'n':
{ number = 1; break;}
default:
{ printf("find: illegal option %c \n", c); argc = 0; found = -1; break;}
}
}
}
if(argc != 1){
printf("Usage: find -x -n pattern\n");
}else{
while(getnewline(line, LINE_LIMIT) > 0){
lineno++;
if((strstr(line, *argv) != NULL) != except){
if(number){
printf("%d: ", lineno);
}
printf("%s", line);
found++;
}
}
}
return found;
}
int main()
{
int i=0,j=0,n;
char line[MAXLEN];
char *lines[MAXLINES];
while((n=getnewline(line, MAXLEN)) > 0) {
lines[i]= (char *)malloc(n*sizeof(int));;
strcpy(lines[i], line);
i++;
}
while(j<=i) {
printf("%s", lines[j++]);
//free(lines[j]);
}
return 0;
}
int main(void){
int cursor;
int indexofline;
char lines[LINE_NUMBER][LINE_LIMIT];
indexofline = 0;
while(getnewline(lines[indexofline], LINE_LIMIT)){ indexofline++;}
cursor=0;
for(cursor=0; cursor<indexofline; cursor++){
printf("index %d of lines is %s.", cursor, lines[cursor]);
}
return 0;
}
int main() {
int len;
extern int max;
extern char longest[];
max = 0;
while((len = getnewline()) > 0) {
if (len > max) {
max = len;
copy();
}
if (max > 0) {
printf("%s", longest);
}
return 0;
}
}
main()
{
int len, max;
char line[MAXLINE]; /* linea actual */
char longest[MAXLINE]; /* linea mas larga */
max = 0;
while ((len = getnewline(line, MAXLINE)) > 0)
if (len > max) {
max = len;
copy(longest, line);
}
if (max > 0) /* hay una linea */
printf("%s", longest);
return 0;
}
int main(int argc, char* argv[]){
short c;
int lineno;
int linelen;
int toprint;
char linebuffer[LINE_LIMIT];
char* lines[LINE_NUMBER];
toprint = -1;
while(--argc > 0 && (*++argv)[0] == '-'){
while((c=*++argv[0])){
switch(c){
case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9':
{ if(toprint == -1){ toprint = 0;} toprint = toprint * 10 + c - '0'; break;}
default:
{ printf("unknow flags to the tail.\n"); break;}
}
}
}
if( argc != 0 || toprint == -1){
printf("Usage: tail -n\n");
return -1;
}
lineno = 0;
while((linelen=getnewline(linebuffer, LINE_LIMIT)) > 0){
lines[lineno] = memalloc(linelen+1);
strcpy(lines[lineno++], linebuffer);
}
while(toprint-- > 0){
if(--lineno >= 0){
printf("%d: %s", lineno+1, lines[lineno]);
}
}
return 0;
}
int main(){
char *S = getnewline();
printf("%s\n", S);
free(S);
return 0;
}