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Lời giải:
program hotrotinhoc;
var a,b : integer;
s: longint;
t: real;
begin
write('A='); readln(a);
write('B='); readln(b);
s:=a;
s:=s+b;
writeln(s);
s:=0;
s:=a;
s:=s-b;
writeln(s);
s:=0;
s:=a;
s:=s*b;
writeln(s);
t:=a;
t:=t/b;
write(t:1:2);
readln
end.
Bài 1:
program pstg;
uses crt;
var a,b,i,u : integer;
f : text;
BEGIN
clrscr;
assign(f,'PSTG.INP');
reset(f);
read(f, a);
read(f, b);
u:=1;
for i:= 1 to a do if ((a mod i)=0) and ((b mod i)=0) and (i>u) then u:=i;
a:= a div u;
b:= b div u;
assign(f,'PSTG.OUT');
rewrite(f);
write(f, a,' ',b);
close(f);
END.
bài 4 dễ ẹt à
uses crt;
const fi='quediem.inp';
fo='quediem.out';
var i,m,n,d,x,j,csc:longint;
a,b:array[1..1000]of integer;
f1,f2:text;
begin
clrscr;
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
readln(f1,n);
{-------------------------tim-so-lon-nhat--------------------------}
write(f2,'so lon nhat la: ');
m:=n;
if m mod 2=0 then
begin
for i:=1 to n div 2 do
write(f2,'1');
end
else begin
write(f2,'7');
for i:=2 to n div 2 do
write(f2,'1');
end;
{----------------------------tim-so-nho-nhat------------------------}
writeln(f2);
a[1]:=2; b[1]:=1;
a[2]:=5; b[2]:=2;
a[3]:=4; b[3]:=4;
a[4]:=6; b[4]:=6;
a[5]:=3; b[5]:=7;
a[6]:=7; b[6]:=8;
d:=(n div 7)+1;
if n mod 7=0 then d:=d-1;
if d=1 then begin
case n of
2:write(f2,'so nho nhat la: ',1);
3:write(f2,'so nho nhat la: ',7);
4:write(f2,'so nho nhat la: ',4);
5:write(f2,'so nho nhat la: ',2);
6:write(f2,'so nho nhat la: ',0);
7:write(f2,'so nho nhat la: ',8);
end;
end;
if d>1 then
begin
write(f2,'so nho nhat la: ');
for i:=1 to d do
if i=1 then begin
b[4]:=6;
for j:=1 to 6 do
begin
x:=n;
x:=x-a[j];
csc:=x div 7+1;
if x mod 7=0 then csc:=csc-1;
if csc=d-i then begin
write(f2,b[j]);
n:=x;
break;
end;
end;
end
else begin
a[1]:=6; b[1]:=0;
a[2]:=2; b[2]:=1;
a[3]:=5; b[3]:=2;
a[4]:=4; b[4]:=4;
a[5]:=3; b[5]:=7;
a[6]:=7; b[6]:=8;
for j:=1 to 6 do
begin
x:=n;
x:=x-a[j];
csc:=(x div 7)+1;
if x mod 7=0 then csc:=csc-1;
if csc=d-i then begin
write(f2,b[j]);
n:=x;
break;
end;
end;
end;
end;
close(f1);
close(f2);
readln;
end.
Program HOC24;
var a: array[1..100] of integer;
i,n,d: integer;
t: longint;
begin
write('Nhap so phan tu n='); readln(n);
d:=0;
for i:=1 to n do
begin
write('a[',i,']='); readln(a[i]);
if a[i]>0 then
begin
d:=d+1;
t:=t+a[i];
end;
end;
write('Trung binh cong cac so duong trong mang la :',t/d:1:2);
readln
end.
uses crt;
var n,a,b,q:integer;
begin
clrscr;
write('n='); readln(n);
for a:=1 to n do
for b:=a to n do
if trunc(sqrt(sqr(a)+sqr(b)))=sqrt(sqr(a)+sqr(b)) then writeln(a,' ',b);
readln;
end.
tự luận bài 5
uses crt;
var a,b,c,d:integer;
tbc:real;
begin
clrscr;
write('a='); readln(a);
write('b='); readln(b);
write('c='); readln(c);
write('d='); readln(d);
tbc:=(a+b+c+d)/4;
writeln('trung binh cong cua 4 so la: ',tbc:4:2);
readln;
end.
Đáp án đúng : A