就我把数据结构（C语言）里面的顺序表合并的代码加到我的学生管理系统里，结果就报错

//我用的VS2019 void MergeList_Sq(SqList LA,SqList LB,SqList &LC){ int length; student *pa,*pb,*pc,*pa_last,*pb_last; LC.length = LA.length+LB.length; LC.elem=new student[LC.length]; pc=LC.elem; pa=LA.elem; pb=LB.elem; pa_last=LA.elem+LA.length-1; pa_last=LB.elem+LB.length-1; while((pa<=pa_last)&&(pb<=pb_last)){ if(*pa<=*pb） *pc++=*pa++; /*就这个*pa<=*pb，它报错说无法从“student*”转换为“int*”*/ else *pc++=*pb++; } while(pa<=pa_last) *pc++=*pa++; while(pa<=pb_last) *pc++=*pb++; }