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Message: [QUOTE="Adrian, post: 3086046"] What is the best was to do this in c++. This is going to be used for unix util that should be able to have input piped to it or file name spec #include <stdio.h> int main(int argc, char *argv[]) { FILE *fp; int c; if(argc==2) { fp=fopen(argv[1], "r"); } else { fp=stdin; } while((c=fgetc(fp))!=EOF) { printf("%c",c); } return 0; } I assume it has something to do with the underlying buffer and have tried this but it wont compile. #include <iostream> #include <fstream> int main(int argc, char *argv[]) { std::ifstream in; if(argc==2) { in.open(argv[0]); } else { in.rdbuf(std::cin.rdbuf()); } int c; while(c==in.get()) { std::cout << c; } return 0; } [/QUOTE]