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1:
max:=a;
if max<b then max:=b;
2:
min:=a;
if min>b then min:=b;
3: if (x=sqr(a)+sqr(b)) and (a<0) then writeln(x);
if (x=sqrt(b)+sqrt(a)) and (a>0) then writeln(x);
uses crt;
const fi='so.txt';
var f1:text;
a:array[1..100]of integer;
n,i:integer;
begin
clrscr;
assign(f1,fi); reset(f1);
readln(f1,n);
for i:=1 to n do
read(f1,a[i]);
for i:=1 to n do
write(a[i]:4);
close(f1);
readln;
end.
Uses crt;
Var a,b: real;
Begin
Clrscr;
Writeln('Nhap a,b');
Realn(a,b);
If (a>0) and (b>0) then writeln('Tich cua a,b la:', a*b)
else writeln('Yeu cau nhap lai');
Readln;
End.
Câu 1:
uses crt;
var a:array[1..100]of integer;
i,n:integer;
begin
clrscr;
write('Nhap n='); readln(n);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
for i:=1 to n do
write(a[i]:4);
readln;
end.
Câu 2:
uses crt;
var a:array[1..100]of integer;
i,n:integer;
begin
clrscr;
write('Nhap n='); readln(n);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
for i:=1 to n do
if a[i] mod 2=0 then write(a[i]:4);
readln;
end.
uses crt;
var xa,ya,xb,yb,xc,yc,p,s,ab,bc,ac:real;
begin
clrscr;
readln(xa,ya,xb,yb,xc,yc);
ab:=sqrt(sqr(xa-xb)+sqr(ya-yb));
ac:=sqrt(sqr(xa-xc)+sqr(ya-yc));
bc:=sqrt(sqr(xb-xc)+sqr(yb-yc));
p:=(ab+bc+ac)/2;
s:=sqrt(p*(p-ab)*(p-ac)*(p-bc));
writeln(s:4:2);
readln;
end.
program text;
uses crt;
var i:integer;
a,b,c,ha,hb,hc,p,S:real;
X,Y:array[1..3] of integer;
Begin
clrscr;
Writeln('Nhap toa do cac dinh A, B, C:');
for i:= 1 to 3 do readln(X[i],Y[i]);
a:=sqrt(sqr(X[2]-X[3])+sqr(Y[2]-Y[3]));
b:=sqrt(sqr(X[1]-X[3])+sqr(Y[1]-Y[3]));
c:=sqrt(sqr(X[2]-X[1])+sqr(Y[2]-Y[1]));
p:= (a+b+c)/2;
S:= sqrt(p*(p-a)*(p-b)*(p-c));
Writeln('Dien tich cua tam giac la: ',S:0:4);
ha:=2*S/a;
hb:=2*S/b;
hc:=2*S/c;
writeln('ha = ',ha:0:2,' hb = ',hb:0:2,' hc = ',hc:0:2);
readln;
end.