I have the following `C` program.

```
#include<stdio.h>

int main() {
    int i = 0;
    char ch;

    printf("Starting test application\n");

    for (i=0; i<10; i++) {
        ch = getchar();

        printf("character at %d = %d\n", i, ch);
    }

    return 0;
}

```

I want to run this program as a sub-process from `Go` language. In my `Go` code, I have a `byte` array which I want to be used as input to my `C` program. I tried following approach and it did not work.

```
cmd := exec.Command("/home/dodtech/go-workspace/MachineListener/Test")

cmd.Stdout = os.Stdout
err := cmd.Start()

if err == nil {
    var ctrlc [9]byte
    ctrlc[0] = 0x00
    ctrlc[1] = 0x01
    ctrlc[2] = 0x02
    ctrlc[3] = 0x03
    ctrlc[4] = 0x04
    ctrlc[5] = 0x05
    ctrlc[6] = 0x06
    ctrlc[7] = 0x07
    ctrlc[8] = 0x08
    ctrlc[9] = 0x09

    cmd.Stdin = bytes.NewReader(ctrlc[0:])
    cmd.Stdin.Read(ctrlc[0:])
}

```

To be noted, both of the above program is just a test program and they only represent what I want to achieve. They are not meant to be efficient and was not written according to programming guidelines(for example the way byte array was created). If I can solve my problem for this small case, I will be able to port it to my actual software code. I would appreciate if anyone can guide me how I can do this .