void selectSort(SortObject * pvector){
int i,j,k;
RecordNode temp;
for(i=0;i<pvector->n-1;i++){
int i,j,k;
RecordNode temp;
for(i=0;i<pvector->n-1;i++){
k=i;
for(j=i+1;j<pvector->n;j++)if(pvector->record[j].key<pvector->record[k].key)k=j;
if(k!=i){temp=pvector->record[i];pvector->record[i]=pvector->record[k];pvector->record[k]=temp;}
}
}