cgo 之go访问c的字符串

package main


//#include <stdio.h>
//#include <string.h>
//#include <malloc.h>
//static char name[30]={0};
//char* get_name_addr(){return name;}
//void show_name(){printf("name=%s\n",name);}
import "C"
import "unsafe"

func main() {
    t := C.get_name_addr()

    cs := C.CString("abcd")
    defer C.free(unsafe.Pointer(cs))  //字符串这样要注意.

    C.strcpy(t,cs)
    //C.strcpy((*C.char)(unsafe.Pointer(t)),cs)
    //C.strcpy((*C.char)(unsafe.Pointer(t)),(*C.char)(unsafe.Pointer(cs)))

    C.show_name()
}

输出

abcd