Go calls other C libraries. If the command line method is used, the redirection output is not supported. If the SMP protocol is not opened, messages are sent to the other party, and no response is returned.

Most of the time, you must learn to stand on the shoulders of giants and use other people's existing things as long as they are open-source and legal.

Go calls other C libraries in two ways: 1. Check whether an interface exists and write it in CGO mode; 2. run the command line directly. The C library that must be called has been installed and run on this machine.

Gifsicle is used to efficiently process GIF files.

Http://download.csdn.net/detail/u010026901/7711469

Redirection compliance> errors occur in the code, so implementing redirection in the Code replaces command line redirection.

Package main


Import (
// "Encoding/JSON"
// "FMT"
"Log"
"OS"
"OS/exec"
)


Func main (){
F, _: = OS. Create ("out ")
CMD: = exec. Command ("Echo", "-n", '{"name": "Bob", "Age": 32 }')
Cmd. stdout = f
// Stdout, err: = cmd. stdoutpipe ()
// If Err! = Nil {
// Log. Fatal (ERR)
//}
If err: = cmd. Start (); Err! = Nil {
Log. Fatal (ERR)
}
// Var person struct {
// Name string
// Age int
//}
//
// If err: = JSON. newdecoder (stdout). Decode (& person); Err! = Nil {
// Log. Fatal (ERR)
//}
If err: = cmd. Wait (); Err! = Nil {
Log. Fatal (ERR)
}
// FMT. printf ("% s is % d years old \ n", person. Name, person. Age)
}