FDS_stack
Stack
PUSH
tempCell -> next = S -> next
S -> next = tempCellTOP
return S -> next -> elementPOP
temp = S
S = S -> next
free(temp)尾递归
编译器自动修正为循环
FDS_stack
      http://pikapikagfy.github.io/2024/02/25/FDS-stack/
    Stack
tempCell -> next = S -> next
S -> next = tempCellreturn S -> next -> elementtemp = S
S = S -> next
free(temp)编译器自动修正为循环