unbuffered

Consider this little programm be compiled as application.exe #include <stdio.h> int main() { char str[100]; printf ("Hello, please type something\n"); scanf("%[^\n]s", &str); printf("you typed: %s\n", str); return 0; } Now I use this code to start application.exe and fetch its output. #include <stdio.h> #include <iostream> #include <stdexcept> int main() { char buffer[128]; FILE* pipe = popen("application.exe", "r"); while (!feof(pipe)) { if (fgets(buffer, 128, pipe) != NULL) printf(buffer); } pclose(pipe); return 0; } My problem is that there is no output until I did my input. Then both

In case of buffered stream it said in a book that it wait until the buffer is full to write back to the monitor. For example: cout << "hi"; What do they mean by "the buffer is full". cerr << "hi"; It is said in my book that everything sent to cerr is written to the standard error device immediately, what does it mean? char *ch; cin>> ch; // I typed "hello world"; In this example ch will be assigned to "hello" and "world" will be ignored does it mean that it still in the buffer and it will affect the results of future statements? Your book doesn't seem very helpful. 1) The output streams send

Consider the following C program (test.c): #include <stdio.h> int main() { printf("string out 1\n"); fprintf(stderr, "string err 1\n"); getchar(); printf("string out 2\n"); fprintf(stderr, "string err 2\n"); fclose(stdout); } Which should print a line to stdout, a line to stderr, then wait for user input, then another line to stdout and another line to stderr. Very basic! When compiled and run on the command line the output of the program when complete (user input is received for getchar()): $ ./test string out 1 string err 1 string out 2 string err 2 When trying to spawn this program as a

For the sake of education, and programming practice, I'd like to write a simple library that can handle raw keyboard input, and output to the terminal in 'real time'. I'd like to stick with ansi C as much as possible, I just have no idea where to start something like this. I've done several google searches, and 99% of the results use libraries, or are for C++. I'd really like to get it working in windows, then port it to OSX when I have the time. Sticking with Standard C as much as possible is a good idea, but you are not going to get very far with your adopted task using just Standard C. The