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}</lang>

=={{header|C++}}==

<lang C++>#include <fstream>

#include <string>

#include <iostream>

int main( int argc , char** argv ) {

int linecount = 0 ;

std::string line ;

std::ifstream infile( argv[ 1 ] ) ;

if ( infile ) {

while ( getline( infile , line ) ) {

std::cout << linecount << ": " << line << '\n' ;//supposing '\n' to be line end

linecount++ ;

}

}

infile.close( ) ;

return 0 ;