各位，问一个C的问题哈，求解释

void csv_del_cell(CSV * csv, int row, int col) {
ROW * prow;
ROW * ptmprow;
COL * pcol;
COL * pcol1;
COL * pcol2;
COL * ptmpcol;
int k,w;
COL * tmp_col;
if(row < 1||col < 1) {
return;
}
if(csv->total < row ||csv->row->total < col) {
return;
}
else{
prow = csv->row;
for(k = 0;k < row - 1;k ++) {
prow = prow->next;
}
pcol = prow->col;
for(k = 0;k < col - 2;k ++) {
pcol = pcol->next;
}
if(col==1){
pcol=pcol->next;
}
else
{
pcol->next=pcol->next->next;
}
}
}