I cann't use ifstream to read file

[eslam]

i have an encryption program that take input from a text file and encrypt it and put the output in atext file then to decrypt it again i take the encrypted file as input for decryption program but i cannot read all the content of this file i can only read apart of it although that iam using what i did in the encryption program to read the input file.
the encrypted file is "u،~«چںaJj²طوڑظپهزz^®h6´؛تٌSaطyْ²ٍbزyàê–è@؛
wF
¹LVچ*ï§ک²ٍهئ‹غ·z)²7œf&€¬|{*]O‘•RاMwvS,lج´رë€ت^M»بف_¢!d
‏5و½CگّغS¨”dACc+Q oô
…إ·ؤâگض’‘إ2ك6@®eث2¼³َِ¢?]رْ³!§‰ Vමé·¢‏7¢اV\»
K18ض•5T
¦k.و_ك~¯%ˆü}7ظ؟”b’~Q3Oهذ. ™'!ذ7*ن‘ْژ*,دحىZcFŒà{ْ\^¾عبzèںىھKَ9فPêفƒ®ظüکKپ µŒ*اج¹ٌ:iده±=´yٌl.
2Aا#RطNc4 *ھ
؟îِxDft£vâغ´©ے%5ح‹Oذâv€ا¯ْ4تùٌˆ–
¼"


my code to read it is:

ifstream infilo;
infilo.open("C:\\Dev-Cpp\\rc4\\in_cipher.txt");
std::string ciphero((std::istreambuf_iterator<char> (infilo)),std::istreambuf_iterator<char>());
infilo.close();


i want to read all the data in the encrypted file any help plz