PASCAL从键盘输入一个长度不超过40的字符串,按要求进行删除。求大师讲...答:var s:string; i,j,L:integer; c1,c2:char; found:boolean;begin readln(s); L:=length(s); found:=false;read(c1);if c1='D' then begin read(c2,c2);i:=pos(c2,s);if i>0 then begin delete(s,i,1); found:=true end;end;if c1='I' then begin read(c1,c1,c2,c2);...