const WEnter=7; key=13; next_line:array[1..WEnter]of string=(';','begin','else','then','repeat','do','var'); key_word:array[1..key]of string=('begin','end','function','procedure','var','if','else','repeat','until','while','type','const','for');//关键的语句（需要缩进的） suojin=1; maxn=100;var i,j,t,long:longint; s:string; pg,pg_key:array[1..maxn]of string; kg:array[1..maxn]of longint; full:array[1..maxn]of boolean;function noAlphabat(s:string):boolean;这个字符串不全为空格 begin if s='' then exit(true); while s[1]=' ' do begin delete(s,1,1); if s='' then break; end; if s='' then exit(true); exit(false); end;procedure Enterat(x,y:longint);在x，y的地方按一个回车 var i:longint; s:string; begin for i:=long downto x+1 do pg[i+1]:=pg[i]; pg[x+1]:=''; s:=copy(pg[x],y,length(pg[x])-y+1); pg[x]:=copy(pg[x],1,y-1); pg[x+1]:=s; long:=long+1; end;function next(i:longint):longint;//找与第i行后9含）第一个begin对应的end var t,j:longint; begin t:=0; for j:=i to long do begin if pg_key[j]='begin' then t:=t+1; if pg_key[j]='end' then t:=t-1; if t=0 then exit(j); end; writeln('Pairing error with begin-end!'); //close(output); halt; end;function next2(i:longint):longint;//找与第i行后（含）的第一个repeat配对的until var t,j:longint; begin t:=0; for j:=i to long do begin if pg_key[j]='repeat' then t:=t+1; if pg_key[j]='until' then t:=t-1; if t=0 then exit(j); end; writeln('Pairing error with repeat-until!'); //close(output); halt; end;procedure dfs(l,r,t:longint);//第l到r区间里的代码格式化（初始值t个空格） var i,k:longint; alldo,had_done:boolean; begin if l>r then exit; for i:=l to r do kg[i]:=t; alldo:=true; for i:=l to r do if pg_key[i]<>'do' then alldo:=false; if alldo then//全部不需缩进则跳出 exit; i:=l; while i<=r do begin had_done:=false; if pg_key[i]='begin' then//begin处理 begin dfs(i+1,next(i)-1,t+1); i:=next(i)+1; had_done:=true; end; if pg_key[i]='repeat' then//repeat处理 begin had_done:=true; dfs(i+1,next2(i)-1,t+1); i:=next2(i)+1; end; if (pg_key[i]='if')or(pg_key[i]='while')or(pg_key[i]='for') then//if、while、for处理(共同点是后面可以加begin-end、也可以加do) begin had_done:=true; if pg_key[i+1]='do' then begin dfs(i+1,i+1,t+1); if pg_key[i+2]='else' then //else后相同处理 begin if pg_key[i+3]='do' then begin dfs(i+3,i+3,t+1); i:=i+4; end; if pg_key[i+3]='begin' then begin dfs(i+3,next(i+3),t+1); i:=next(i+3)+1; end; if pg_key[i+3]='repeat' then begin dfs(i+3,next2(i+3),t+1); i:=next2(i+3)+1; end; end else i:=i+2; end; if pg_key[i+1]='begin' then begin dfs(i+1,next(i+1),t+1); if pg_key[next(i+1)+1]='else' then begin if pg_key[next(i+1)+2]='do' then begin dfs(next(i+1)+2,next(i+1)+2,t+1); i:=next(i+3); end; if pg_key[next(i+1)+2]='begin' then begin dfs(next(i+1)+2,next(next(i+1)+2),t+1); i:=next(next(i)+2)+1; end; if pg_key[next(i+1)+2]='repeat' then begin dfs(next(i+1)+2,next2(next(i+1)+2),t+1); i:=next2(next(i+1)+2)+1; end; end else i:=next(i+1)+1; end; if pg_key[i+1]='repeat' then begin dfs(i+1,next2(i+1),t+1); if pg_key[next2(i+1)+1]='else' then begin if pg_key[next2(i+1)+2]='do' then begin dfs(next2(i+1)+2,next2(i+1)+2,t+1); i:=next2(i+3); end; if pg_key[next2(i+1)+2]='begin' then begin dfs(next2(i+1)+2,next(next2(i+1)+2),t+1); i:=next(next2(i)+2)+1; end; if pg_key[next2(i+1)+2]='repeat' then begin dfs(next(i+1)+2,next2(next2(i+1)+2),t+1); i:=next2(next2(i+1)+2)+1; end; end else i:=next2(i+1)+1; end; end; if (pg_key[i]='procedure')or(pg_key[i]='function') then begin had_done:=true; dfs(i+1,next(i+1),t); i:=next(i+1)+1; end; if (pg_key[i]='var')or(pg_key[i]='type')or(pg_key[i]='const')then begin had_done:=true; k:=i; while pg_key[k+1]='do' do k:=k+1; dfs(i+1,k,t+1); i:=k+1; end; if not had_done then i:=i+1; end; end;begin long:=0; while not eof do begin long:=long+1; readln(pg[long]); end; for i:=1 to long do begin t:=0; while (pg[i]<>'')and(pg[i][1]=#9) do begin t:=t+1; delete(pg[i],1,1); end; for j:=1 to t*4 do pg[i]:=' '+pg[i]; end; i:=1; while i<=long do//黏在一起的语句拆开 begin for j:=1 to WEnter do if pos(next_line[j],pg[i])<>0 then if not(noAlphabat(copy(pg[i],pos(next_line[j],pg[i])+length(next_line[j]),length(pg[i])-pos(next_line[j],pg[i])-length(next_line[j])+1))) then begin t:=pos(next_line[j],pg[i])+length(next_line[j]); Enterat(i,t); end; i:=i+1; end; for i:=1 to long do while pg[i,1]=' ' do delete(pg[i],1,1); fillchar(full,sizeof(full),true); for i:=1 to long do if pg[i]='' then full[i]:=false; t:=0; for i:=1 to long do if full[i] then begin t:=t+1; pg[t]:=pg[i]; end; for i:=t+1 to long do pg[i]:=''; long:=t; for i:=1 to long do begin for j:=1 to key do if pos(key_word[j],pg[i])<>0 then begin pg_key[i]:=key_word[j]; break; end; if pg_key[i]='' then pg_key[i]:='do'; end; dfs(1,long,0); for i:=1 to long do kg[i]:=kg[i]*suojin; for i:=1 to long do writeln('':kg[i],pg[i]);end. 比较坑爹的就是for循环嵌套无法处理，求大神帮修改