Reading input and parameter

I would like to know how i can read a parameter and also an input while running the program.

assume my program name is "readfile"

I would like to make it in such a way that when i type "readfile parameter < filename", it will run the readfile program and in the program it will read the parameter and also the filename. How can i archieve this ? For your information i am coding this in C and not C++.

int main( int argc, char *argv)

Do you know what argc and argv are?

Well, use that:

Code:

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int main(int argc, char *argv)

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argc shows you the number of entered parameters, and argv contains them.
In your case the first parameter of argv contain your "parameter", second the "filename".

Not quite everything P & d < denotes a redirection so it becomes stdin...

do something like:

HANDLE foo = GetStdHandle(STD_INPUT_HANDLE);
then
ReadFile(...) on the handle to the buffer in the file

Do you hav a sample code on how i can use

HANDLE hStdout = GetStdHandle(STD_OUTPUT_HANDLE); ??

Quote:

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Originally posted by winsonlee
Do you hav a sample code on how i can use

HANDLE hStdout = GetStdHandle(STD_OUTPUT_HANDLE); ??

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Code:

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#include <windows.h>
#include <iostream>
using namespace std;
int main(int argc, char* argv[])
{
 
    HANDLE  hStdIn = GetStdHandle(STD_INPUT_HANDLE);
    DWORD  dwNumRead = 0;
    BYTE    buffer[65535] = {0};
    while(ReadFile(hStdIn,&buffer,sizeof(buffer),&dwNumRead,NULL) != (dwNumRead == 0) )
    {
        cout << buffer;
        memset(&buffer,0,sizeof(buffer));
    } 
        return 0;
}

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/I should know better.

For your information the window.h is not found in the linux system. Is there anyway i can use the above method ???

Quote:

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Originally posted by winsonlee
For your information the window.h is not found in the linux system. Is there anyway i can use the above method ???

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That's why we have the non-visual c++ forum to post in, not the visual c++ forum. for linux, or even this you could probably use fopen and the stdinput handle, then fread...