How do I print the content of a file?

by

#include <iostream>
#include <fstream>
int main(int argc , char *argv[])
{
if(argc < 2)
{
std::cout << " Wrong usage " << std::endl;
exit(0);
}
std::string file_name = argv[1];
std::ifstream fs;
fs.open(file_name.c_str());
std::cout << file_name << std::endl;
std::string line ;
while(fs >> line)
{
std::cout << line << std::endl;
}
return 0;
}

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