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uses crt;
var st:string;
i,d:integer;
begin
clrscr;
write('Nhap xau:'); readln(st);
d:=length(st);
writeln('Xau vua nhap la: ',st);
for i:=1 to d do
if st[i] in ['a'..'z'] then upcase(st[i]);
writeln(st);
readln;
end.
uses crt;
const fi='dulieu.txt';
var f1:text;
st:string;
i,d:integer;
begin
clrscr;
assign(f1,fi); rewrite(f1);
write('Nhap xau:'); readln(st);
d:=length(st);
for i:=1 to d do
if (st[i] in ['A'..Z']) or (st[i] in ['0'..'9']) or (st[i]=#32) then write(f1,st[i]);
close(f1);
end.
uses crt;
var s:string;
i,d,dem1,dem2,dem3,dem4:integer;
begin
clrscr;
write('Nhap xau s:'); readln(s);
d:=length(s);
dem1:=0;
dem2:=0;
dem3:=0;
dem4:=0;
for i:=1 to d do
begin
if st[i] in ['0'..'9'] then inc(dem1)
else if st[i] in ['a'..'z'] then inc(dem2)
else if st[i] in ['A'..'Z'] then inc(dem3)
else inc(dem4);
end;
writeln('So luong ky tu so la: ',dem1);
writeln('So luong ky tu thuong la: ',dem2);
writeln('So luong ky tu hoa la: ',dem3);
writeln('So luong ky tu dac biet la: ',dem4);
readln;
end.
#include <bits/stdc++.h>
using namespace std;
int d,i,d1;
string st;
int main()
{
getline(cin,st);
d=st.length();
while (st[0]==32)
{
st.erase(0,1);
}
while (st[d-1]==32)
{
st.erase(d-1,1);
}
d1=st.length();
for (i=0; i<d1; i++)
if ((st[i]==32) && st[i+1]==32)
{
st.erase(i,1);
i--;
}
cout<<st;
return 0;
}
tk
uses crt;
var st1:string;
i,d:integer;
begin
clrscr;
write('Nhap xau:'); readln(st1);
d:=length(st1);
for i:=1 to d do
if (st1[i]='a') and (st1[i+1]='b') and (st1[i+2]='c') then delete(st1,i,3);
writeln(st1);
readln;
end.
uses crt;
const fi='dulieu.txt';
var f1:text;
st:string;
i,d:integer;
begin
clrscr;
assign(f1,fi); rewrite(f1);
write('Nhap xau:'); readln(st);
d:=length(st);
for i:=1 to d do
if (st[i] in ['A'..Z']) or (st[i] in ['0'..'9']) or (st[i]=#32) then write(f1,st[i]);
close(f1);
end.