printf计算参数是从右到左压栈的吗？面宝P32（不确定）

#include <iostream>
#include <stdio.h>
using namespace std;
int main(){
    int a=1;
    cout<<a++<<" "<<a<<endl;//12
    a=1;
    cout<<a<<" "<<a++<<endl;//21
    a=1;
    printf("%d %d\n",a,a++);//21
    a=1;
    printf("%d %d\n",a++,a);//12
}

public class Test{
    public static void main(String[] args){
        int a=1;
        System.out.println((a++)+" "+a);//1 2
        a=1;
        System.out.println(a+" "+(a++));//1 1
    
    }
  }