C1:

khai báo:

      program  hieu_a_va_b   ("tự đặt tên cái này ko cần thiết)

      uses crt;

      var a, b : integer

phần thân:

       begin

            writeln ("nhap so a");  read(a);

            writeln ("nhap so b");  read(b);

             writeln ("hieu cua hai so la: a - b=" , a - b);

        end.

C2:

khai báo:

      program    tinh_ba_so

      uses crt;

      var a, b, c : integer

phần thân:

       begin

            writeln ("nhap so a");  read(a);

            writeln ("nhap so b");  read(b);

            writeln ("nhap so c");  read(c);

             writeln ("ket qua cua phep tinh a+b-c la" , a+b-c);

        end.

C3:

khai báo:

      program    tinh_ba_so

      uses crt;

      var x, y, z : integer

phần thân:

       begin

            writeln ("nhap so x");  read(x);

            writeln ("nhap so y");  read(y);

            writeln ("nhap so z");  read(z);

             writeln ("ket qua cua phep tinh (x+y)*z la") , (x+y)*z);

        end.

nhớ chạy thử chương trình nha. xem có lỗi ko.

(nhớ tick cho mk nha)

Câu 1:

Uses crt;

Var a,b:real;

Begin

Clrscr;

Readln(a);

Readln(b);

Writeln((a+b)/(a-b));

Readln

End.

Câu 2:

Uses crt;

Var a,b,c:real;

Begin

Clrscr;

Readln(a);

Readln(b);

Readln(c);

Writeln(a*a+b*b+c*c);

Readln

End.

Câu 5:

Uses crt;

Var a,b,c,d:real;

Begin

Clrscr;

Readln(a);

Readln(b);

Readln(c);

Readln(d);

Writeln((a+b+c+d)/4);

Readln

End.

Câu 1: 

uses crt;

var a,b:integer;

begin

clrscr;

readln(a,b);

write(a+b);

readln;

end.

Câu 2:

uses crt;

var a,b,c:integer;

begin

clrscr;

readln(a,b,c);

writeln(a+b-c);

readln;

end.

Câu 3: 

uses crt;

var a,b:integer;

begin

clrscr;

readln(a,b);

writeln(a-b);

readln;

end.

Câu 4: 

uses crt;

var x,y,z:integer;

begin

clrscr;

readln(x,y,z);

writeln((x+y)*z);

readln;

end.

Câu 1: 

#include <bits/stdc++.h>

using namespace std;

double a,b,c;

int main()

{

cin>>a>>b>>c;

cout<<fixed<<setprecision(2)<<a*b*c;

return 0;

}

Câu 1: 

uses crt;

var a,s,p:real;

begin

clrscr;

repeat

write('Nhap do dai canh hinh vuong:'); readln(a);

until a>0;

p:=4*a;

s:=sqr(a);

writeln('Chu vi hinh vuong la: ',p:4:2);

writeln('Dien tich hinh vuong la: ',s);

readln;

end.

Câu 2: 

uses crt;

var a,b,t,s,h:real;

begin

clrscr;

write('Nhap a='); readln(a);

write('Nhap b='); readln(b);

t:=a+b;

h:=a-b;

s:=a*b;

writeln('Tong la: ',t:4:2);

writeln('Hieu la: ',h:4:2);

writeln('Tich la: ',s:4:2);

readln;

end.

Câu 3: 

uses crt;

var a,b,c:real;

begin

clrscr;

repeat

write('Nhap a='); readln(a);

write('Nhap b='); readln(b);

write('Nhap c='); readln(c);

until (a>0) and (b>0) and (c>0);

if (a+b>c) and (a+c>b) and (b+c>a) then writeln('Day la ba canh trong mot tam giac')

else writeln('Day khong la ba canh trong mot tam giac');

readln;

end.

Câu 2:

Program nii;

Uses crt;

Var a,b,c,A:integer;

Begin

Write ('nhap a');

Readln (a);

Write ('nhap b');

Readln (b);

Write ('nhap c');

Readln (c);

A:=a;

If A<b then A:=b;

If A<c then A:=c;

Write ('Ket qua',A);

Readln;

End.

Câu 1

Program ntg;

Uses crt;

Var A,x,y:integer;

Begin

Write ('nhap x');

Readln (x);

Write ('nhap y');

Readln ('y');

A:=x+y;

Write ('Ket qua',A);

Readln;

End.

Câu 2: 

uses crt;

var a,b,c,max:integer;

begin

clrscr;

write('Nhap a='); readln(a);

write('Nhap b='); readln(b);

write('Nhap c='); readln(c);

max:=a;

if max<b then max:=b;

if max<c then max:=c;

writeln('So lon nhat trong 3 so la: ',max);

readln;

end.

Used crt;

Var a,b;

Begin

Clrscr;

Writeln(‘Nhap a:’);Readln(a);

Write(‘Nhap b:’);Readln(b);

Clrscr;

Writeln(‘Tong la:’,a+b);

If m>n then writeln(‘Hieu la:’,a-b) else writeln(‘Hieu la:’,b-a);

Writeln(‘Tich la:’,a*b);

If n<>0 then write(‘Thuong la:’,a:b) else if m<>0 then write(‘Thuong la:’,b:a) else write(‘ Ko tinh dc’);

Readln;

End.

Học rnha