go - How to Pass Console Input to Subprocess from Golang -

i have following c program.

#include<stdio.h>   int main() {     int = 0;     char ch;      printf("starting test application\n");      (i=0; i<10; i++) {         ch = getchar();          printf("character @ %d = %d\n", i, ch);     }      return 0; } 

i want run program sub-process go language. in go code, have byte array want used input c program. tried following approach , 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 noted, both of above program test program , represent want achieve. not meant efficient , not written according programming guidelines(for example way byte array created). if can solve problem small case, able port actual software code. appreciate if can guide me how can .

if want write sub-process standard input, should use stdinpipe.

like:

substdin, err := cmd.stdinpipe() // check err defer substdin.close() io.writestring(substdin, "hello world") 

see docs complete example:

https://golang.org/pkg/os/exec/#cmd.stdinpipe