VC内联汇编和GCC内联汇编的语法区别

VC:

#include <stdio.h>

main(){
    int a = 1;
    int b = 2;
    int c;
    __asm{
        mov eax,a
        mov ebx,b
        mov ecx,1h
        add eax,ebx
        mov c,ecx
    }
    printf("%x\n", c);
}

GCC：

#include <stdio.h>

main(){
    int a = 1;
    int b = 2;
    int c;
    asm(
        "add %2,%0"        //1
        :"=g"(c)           //2
        :"0"(a),"g"(b)     //3
        :"memory"          //4
    );
        printf("%x\n", c);
}