修正？
void quick(Data a[], int left, int right,
int Cmp(Data x, Data y, int order), int order){
int pl;int pr;Data x;int _right;
_right = right;
while(1)
{
pl = left;pr = right;x = a[(pl+pr)/2];
do {while(Cmp(x, a[pl], order)) pl++;while(Cmp(a[pr], x, order)) pr--;
if ( pl <= pr ){swap(Data , a[pl], a[pr]);pl++;pr--;}
} while(pl <= pr );
if (left < pr) {right = pr; continue;}
break;
}
left = 1;right = _right;
while(1)
{
pl = left;pr = right;x = a[(pl+pr)/2];
do {while(Cmp(x, a[pl], order)) pl++;while(Cmp(a[pr], x, order)) pr--;
if ( pl <= pr ){swap(Data , a[pl], a[pr]);pl++;pr--;}
} while(pl <= pr );
if (pl < right) {left = pl; continue;}
break;
}
}