/*----- qsorts() ------*/
void qsorts(int *a_p, int low, int high) {
int i=low, j=high, tmp;
int p = a_p[low];
while (i <= j) {
while (a_p[i] < p) {
i++;
}
while (a_p[j] > p) {
j--;
}
if (i<=j) {
tmp = a_p[i];
a_p[i] = a_p[j];
a_p[j] = tmp;
i++;
j--;
}
}
printlist(a_p);
if (low < j) {
qsorts(a_p, low, j);
}
if (high > i) {
qsorts(a_p, i, high);
}
}
void qsorts(void *v[],int left ,int right,int (*comp)(void *,void *)){
int i,last;
void swap(void *v[],int,int);
if(left>=right)
return;
swap(v,left,(left+right)/2);
last=left;
for (i = left+1;i<= right;i++)
if ((*comp)(v[i],v[left]) < 0)
swap(v, ++last, i);
swap(v,left,last);
qsorts(v,left,last-1,comp);
qsorts(v,last+1,right,comp);
}
/*----- main() -----*/
int main() {
int a[] = {3, 9, 1, 6, 8, 7, 2, 5, 4, 0};
printlist(a);
qsorts(a, 0, A_SIZE-1);
return EXIT_SUCCESS;
}
int main(int argc,char *argv[]){
char *lineptr[MAXLINE];
int nlines;
int stal,endl;
int i,numeric=1;
char c;
if((argc>=2||argc<=4)&&(*argv[1])=='-'){
c=*(argv[1]+1);
if(argc==3){
stal=atoi(argv[2]);
endl=0;}
if(argc==4){
stal=atoi(argv[2]);
endl=atoi(argv[3]);}
switch(c){
case 'n':
if(*(argv[1]+2)=='r'){
option=2;
break;}
option=1;
break;
case 'r':
if(*(argv[1]+2)=='n'){
option=2;
break;}
option=5;
break;
case 'f':
if(*(argv[1]+2)=='d'){
option=6;
break;}
option=3;
break;
case 'd':
if(*(argv[1]+2)=='f'){
option=6;
break;}
option=4;
break;
default:
printf("option error\n");
return 1;
break;
}
}else { if(argc==1)
option=0;
else {
printf("usage error\n");
return 1;
}
}
printf("%d",option);
if(endl<=stal){
printf("start line end line illigal");
return 1;}
if((nlines = readlines(lineptr,MAXLINE))>0){
if(endl>nlines-1)
endl=nlines-1;
switch(option){
case 0:
qsorts((void **) lineptr,stal,endl,(int (*)(void*,void*))strcmp);
break;
case 1:
qsorts((void **) lineptr,stal,endl,(int (*)(void*,void*))numcmp);
break;
case 2:
qsorts((void **) lineptr,stal,endl,(int (*)(void*,void*))numcmp);
break;
case 3:
qsorts((void **) lineptr,stal,endl,(int (*)(void*,void*))fccmp);
break;
case 4:
qsorts((void **) lineptr,stal,endl,(int (*)(void*,void*))dcmp);
break;
case 5:
qsorts((void **) lineptr,stal,endl,(int (*)(void*,void*))strcmp);
break;
case 6:
qsorts((void **) lineptr,stal,endl,(int (*)(void*,void*))fdcmp);
break;
default:
break;
}
writelines(lineptr,nlines);
}else
printf("too big to sort\n");
return 0;
}
