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Câu 3:
#include <bits/stdc++.h>
using namespace std;
string a[1000];
int n,i,dem;
int main()
{
cin>>n;
dem=0;
for (i=1; i<=n; i++)
{
cin>>a[i];
if (a[i]=='a') dem++;
}
cout<<dem;
return 0;
}
uses crt;
var a:array[1..100]of real;
n,i:integer;
kq:real;
begin
clrscr;
write('Nhap so ban hoc sinh:'); readln(n);
for i:=1 to n do
begin
write('Nhap can nang cua ban thu ',i,'='); readln(a[i]);
end;
kq:=0;
for i:=1 to n do
kq:=kq+a[i];
writeln('Can nang trung binh cua lop la: ',kq/n:4:2);
readln;
end.
Bài 1:
Program HOC24;
var i,n,d : byte;
t: integer;
begin
write('Nhap N: '); readln(n);
for i:=1 to n do
begin
write('Nhap phan tu thu ',i,' : '); readln(a[i]);
end;
for i:=1 to n do if (a[i] mod 3=0) and (a[i] mod 5=0) then
begin
d:=d+1;
t:=t+a[i];
end;
writeln('Co ',d,' phan tu la boi cua 3 va 5');
write('Tong la: ',t);
readln
end.
Bài 2:
Program HOC24;
var i,n,k : byte;
begin
write('Nhap N: '); readln(n);
for i:=1 to n do
begin
write('Nhap phan tu thu ',i,' : '); readln(a[i]);
end;
write('Nhap k: '); readln(k);
for i:=1 to n do if a[i]=k then d:=d+1;
writeln('Co ',d,' phan tu bang ',k);
Write('Cac chi so do la: ');
for i:=1 to n do if a[i]=k then write(i,' ');
readln
end.
Câu 1:
program mangsonguyen;
var
a: array[1..100] of integer;
i, n: integer;
begin
writeln('Nhap so phan tu trong mang: ');
readln(n);
writeln('Nhap cac phan tu cua mang: ');
for i := 1 to n do
readln(a[i]);
writeln('Mang vua nhap la:');
for i := 1 to n do
write(a[i], ' ');
end.
Câu 2:
program trungbinhcong;
var
a: array[1..100] of integer;
i, n, k, sum: integer;
avg: real;
begin
writeln('Nhap so phan tu trong mang: ');
readln(n);
writeln('Nhap cac phan tu cua mang: ');
for i := 1 to n do
readln(a[i]);
writeln('Nhap so k: ');
readln(k);
sum := 0;
for i := 1 to n do
begin
if a[i] <= k then
sum := sum + a[i];
end;
if sum > 0 then
begin
avg := sum / n;
writeln('Trung binh cong cac phan tu co gia tri <= ', k, ' la: ', avg:0:2);
end
else
begin
writeln('Khong co phan tu nao co gia tri <= ', k);
end;
end.
Câu 3:
program DemSoNguyenTo;
var
a: array [1..100] of integer;
i, j, n, count: integer;
laSoNguyenTo: boolean;
begin
write('Nhap so phan tu cua mang: ');
readln(n);
write('Nhap cac phan tu cua mang: ');
for i := 1 to n do
readln(a[i]);
count := 0;
writeln('Cac so nguyen to trong mang la: ');
for i := 1 to n do
begin
laSoNguyenTo := true;
for j := 2 to (a[i] div 2) do
begin
if (a[i] mod j = 0) then
begin
laSoNguyenTo := false;
break;
end;
end;
if laSoNguyenTo and (a[i] > 1) then
begin
writeln(a[i]);
count := count + 1;
end;
end;
writeln('Tong so cac so nguyen to la: ', count);
readln;
end.
Bai 2:
uses crt;
var a:array[1..100]of integer;
i,n,t,nn:integer;
begin
clrscr;
readln(n);
for i:=1 to n do readln(a[i]);
nn:=a[1];
for i:=1 to n do
if nn>a[i] then nn:=a[i];
write(nn);
readln;
end.
Tham khảo
uses crt;
var a:array[1..100]of integer;
i,n,dem,t:integer;
begin
clrscr;
write('Nhap n='); readln(n);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
dem:=0;
t:=0;
for i:=1 to n do
if (10<a[i]) and (a[i]<20) then
begin
inc(dem);
t:=t+a[i];
end;
writeln('So phan tu lon hon 10 va nho hon 20 la: ',dem);
writeln('Tong cac phan tu lon hon 10 va nho hon 20 la: ',t);
readln;
end.
câu này là bài 4 đúng ko ạ