Опять не школьный вопрос но кто шарит , напишите в чём ошибка. пишет на 32 строке ошибка was not declared in this scope #include #include using namespace std; int main(int sys) { cout < < "if you would midle write-1, if place of circle-2" < < endl; cin < < sys; if(sys == 1) { float a, b, c, d, e, sum, mid, pi=3.14, g, r; cout < < "input first midle" < < endl; cin > > a; cout < < "inpur second midle" < < endl; cin > > b; cout < < "input third midle" < < endl; cin > > c; cout < < "input thord midle" < < endl; cin > > d; cout < < "input fived midle" < < endl; cin > > e; sum = a + b + c + d + e; mid = sum / 5; cout < < "your midle: "; cout < < mid; } else{ if(sys == 2) { cout < < "this is the circle area formula s=pi*r^2" < < endl; cout < < "input radius(r)" < < endl; cin > > r; cout < < pi * r * r; } } return 0; }

Во-первых в начале НЕ сin << sys, а сin >> s;

Во-вторых ты объявил/а все переменные в первом ифе, а значит в других функциях они уже не видны, поэтому стоит их объявить глобально

В-третьих переменная g не используется, поэтому можно ее и не объявлять

Вот код:

#include <iostream>

#include <cmath>

using namespace std;

int main() {

   int sys;

   float a, b, c, d, e, sum, mid, pi=3.14, r;

   cout << "if you would midle write-1, if place of circle-2" << endl;

   cin >> sys;

   if(sys == 1) {

       cout << "input first midle" << endl;

       cin >> a;

       cout << "inpur second midle" << endl;

       cin >> b;

       cout << "input third midle" << endl;

       cin >> c;

       cout << "input thord midle" << endl;

       cin >> d;

       cout << "input fived midle" << endl;

       cin >> e;

       sum = a + b + c + d + e;

       mid = sum / 5;

       cout << "your midle: ";

       cout << mid;

   }

   else{

       if(sys == 2) {

           cout << "this is the circle area formula S=pi*r^2" << endl;

           cout << "input radius(r)" << endl;

           cin >> r;

           cout << pi * r * r;

       }

   }

   return 0;

}

1)

Program Pr1;
uses crt;
var stroka:string;
a:integer;
Begin
clrscr;
writeln('Vvedite chislo');
readln(stroka);
a:=length(stroka);
a:=Trunc(a/2)+1;
writeln(a);
end.

2)

Program Pr1;
uses crt;
var stroka:string;
a,i:integer;
Begin
clrscr;
writeln('Vvedite stroku');
readln(stroka);
a:=0;
for i:=1 to length(stroka) do if stroka[i]=',' then a:=a+1;
writeln(a);
end.

3)

Program Pr1;
uses crt;
var stroka:string;
a,i:integer;
c:char;
Begin
clrscr;
writeln('Vvedite stroku');
readln(stroka);
writeln('Vvedite simvol');
readln(c);
a:=0;
for i:=1 to length(stroka) do if stroka[i]=c then break
else a:=a+1;
writeln(a);
end.

4)

Program Pr1;
uses crt;
var stroka:string;
procedure word9(strokk:string);
var i:integer;
tmp:string;
begin
for i:=1 to length(stroka) do if (stroka[i]=' ') or (stroka[i]='.') then begin
writeln(tmp,' ',length(tmp));
tmp:='';
end
else tmp:=tmp+stroka[i];
end;
Begin
clrscr;
writeln('Vvedite predlogenie');
readln(stroka);
word9(stroka);
end.

6)

Program Pr1;
uses crt;
var stroka:string;
a,i:integer;
Begin
clrscr;
a:=0;
readln(stroka);
for i:=1 to length(stroka) do if stroka[i] in ['A'..'z'] then a:=a+1;
writeln(a);
end.

7)

Program Pr1;
uses crt;
var stroka:string;
procedure word8(strokk:string);
var i:integer;
begin
for i:=1 to length(strokk) do if strokk[i]=' ' then strokk[i]:='_';
writeln(strokk);
end;
Begin
clrscr;
readln(stroka);
word8(stroka);
end.

8)

Program Pr1;
uses crt;
var stroka,tmp:string;
i,a:integer;
Begin
clrscr;
readln(stroka);
tmp:='';
a:=0;
for i:=1 to length(stroka) do if (stroka[i]=' ') or (stroka[i]='.') then begin
a:=a+1;
writeln(tmp,' ',a);
tmp:='';
end
else tmp:=tmp+stroka[i];
end.

9)

Program Pr1;
uses crt;
var stroka:string;
procedure word7(strokk:string);
var c:char;
i,a:integer;
begin
a:=0;
for i:=1 to length(strokk) div 2 do begin
c:=strokk[i];
strokk[i]:=strokk[length(strokk)-a];
strokk[length(strokk)-a]:=c;
a:=a+1;
end;
writeln();
for i:=1 to length(strokk) do write(strokk[i]);
end;
begin
clrscr;
readln(stroka);
word7(stroka);
end.

10)

Program Pr1;
uses crt;
var stroka,tmp:string;
i,b:integer;
begin
clrscr;
readln(stroka);
stroka[1]:='*';
for i:=1 to length(stroka) do if stroka[i]=' ' then for b:=i to length(stroka) do if stroka[b] in ['A'..'я'] then begin
stroka[b]:='*';
break;
end;

writeln(stroka);
end.

 11)

Program Pr1;
uses crt;
var stroka:string;
i,b:integer;
begin
clrscr;
readln(stroka);
b:=0;
for i:=1 to length(stroka) do if (stroka[i]='А') or (stroka[i]='а') or (stroka[i]='О') or (stroka[i]='о') then b:=b+1;
writeln(b);
end.

1)

Program Pr1;
uses crt;
var stroka:string;
a:integer;
Begin
clrscr;
writeln('Vvedite chislo');
readln(stroka);
a:=length(stroka);
a:=Trunc(a/2)+1;
writeln(a);
end.

2)

Program Pr1;
uses crt;
var stroka:string;
a,i:integer;
Begin
clrscr;
writeln('Vvedite stroku');
readln(stroka);
a:=0;
for i:=1 to length(stroka) do if stroka[i]=',' then a:=a+1;
writeln(a);
end.

3)

Program Pr1;
uses crt;
var stroka:string;
a,i:integer;
c:char;
Begin
clrscr;
writeln('Vvedite stroku');
readln(stroka);
writeln('Vvedite simvol');
readln(c);
a:=0;
for i:=1 to length(stroka) do if stroka[i]=c then break
else a:=a+1;
writeln(a);
end.

4)

Program Pr1;
uses crt;
var stroka:string;
procedure word9(strokk:string);
var i:integer;
tmp:string;
begin
for i:=1 to length(stroka) do if (stroka[i]=' ') or (stroka[i]='.') then begin
writeln(tmp,' ',length(tmp));
tmp:='';
end
else tmp:=tmp+stroka[i];
end;
Begin
clrscr;
writeln('Vvedite predlogenie');
readln(stroka);
word9(stroka);
end.

6)

Program Pr1;
uses crt;
var stroka:string;
a,i:integer;
Begin
clrscr;
a:=0;
readln(stroka);
for i:=1 to length(stroka) do if stroka[i] in ['A'..'z'] then a:=a+1;
writeln(a);
end.

7)

Program Pr1;
uses crt;
var stroka:string;
procedure word8(strokk:string);
var i:integer;
begin
for i:=1 to length(strokk) do if strokk[i]=' ' then strokk[i]:='_';
writeln(strokk);
end;
Begin
clrscr;
readln(stroka);
word8(stroka);
end.

8)

Program Pr1;
uses crt;
var stroka,tmp:string;
i,a:integer;
Begin
clrscr;
readln(stroka);
tmp:='';
a:=0;
for i:=1 to length(stroka) do if (stroka[i]=' ') or (stroka[i]='.') then begin
a:=a+1;
writeln(tmp,' ',a);
tmp:='';
end
else tmp:=tmp+stroka[i];
end.

9)

Program Pr1;
uses crt;
var stroka:string;
procedure word7(strokk:string);
var c:char;
i,a:integer;
begin
a:=0;
for i:=1 to length(strokk) div 2 do begin
c:=strokk[i];
strokk[i]:=strokk[length(strokk)-a];
strokk[length(strokk)-a]:=c;
a:=a+1;
end;
writeln();
for i:=1 to length(strokk) do write(strokk[i]);
end;
begin
clrscr;
readln(stroka);
word7(stroka);
end.

10)

Program Pr1;
uses crt;
var stroka,tmp:string;
i,b:integer;
begin
clrscr;
readln(stroka);
stroka[1]:='*';
for i:=1 to length(stroka) do if stroka[i]=' ' then for b:=i to length(stroka) do if stroka[b] in ['A'..'я'] then begin
stroka[b]:='*';
break;
end;

writeln(stroka);
end.

 11)

Program Pr1;
uses crt;
var stroka:string;
i,b:integer;
begin
clrscr;
readln(stroka);
b:=0;
for i:=1 to length(stroka) do if (stroka[i]='А') or (stroka[i]='а') or (stroka[i]='О') or (stroka[i]='о') then b:=b+1;
writeln(b);
end.