c试题2—++

#include <stdio.h>
int main(int argc ,char *argv[])
{
        int n,j;
        j = 3;
        n = (++j)+(++j)+(++j);
        printf("%d",n);

        return 0;
}

结果？

16

汇编：

movl %edi, -20(%rbp)
        movq %rsi, -32(%rbp)
        movl $3, -8(%rbp)
        addl $1, -8(%rbp)
        addl $1, -8(%rbp)
        movl -8(%rbp), %eax
        addl %eax, %eax
        addl $1, -8(%rbp)
        addl -8(%rbp), %eax
        movl %eax, -4(%rbp)
        movl -4(%rbp), %esi
        movl $.LC0, %edi
        movl $0, %eax
        call printf
        movl $0, %eax