Read a binary file (jpg) to a string using c++ -

i need read jpg file string. want upload file our server, find out api requires string data of pic. followed suggestions in former question i've asked upload pics server using c++ .

int main() {     ifstream fin("cloud.jpg");     ofstream fout("test.jpg");//for testing purpose, see if string right copy     ostringstream ostrm;      unsigned char tmp;     int count = 0;     while ( fin >> tmp ) {         ++count;//for testing purpose         ostrm << tmp;     }     string data( ostrm.str() );     cout << count << endl;//ouput 60! not right size     fout << string;//only 60 bytes     return 0; } 

why stops @ 60? it's strange character @ 60, , should read jpg string?

update

almost there, after using suggested method, when rewrite string output file, distorted. find out should specify ofstream in binary mode ofstream::binary. done!

by way what's difference between ifstream::binary & ios::binary, there abbreviation ofstream::binary?

open file in binary mode, otherwise have funny behavior, , handle non-text characters in inappropriate ways, @ least on windows.

ifstream fin("cloud.jpg", ios::binary); 

also, instead of while loop, can read whole file in 1 shot:

ostrm << fin.rdbuf();