新手求教

[zr6327575622]

额，我想请教一下那个swap函数的 值传递 地址传递和引用调用 这三种该怎么用，给几个例子欣赏一下！谢谢额

[ForestDB]

召唤复制帝及debug帝。

[harderman]

汇编写的很牛X

[suchx]

.MODEL SMALL
.STACK 256H
BYTESIZE=1
WORDSIZE=2
.DATA
 A DW 2
 B DW 4
.CODE
START : NOP
        MOV AX,@DATA
        MOV DS,AX
        MOV ES,AX
        PUSH B
        PUSH A
        CALL SWAPBYVAL
        PUSH DS
        LEA SI,B
        PUSH SI
        PUSH DS
        LEA SI,A
        PUSH SI
        CALL SWAPBYREF
        MOV AX,4C00H
        INT 21H
SWAPBYVAL PROC NEAR
        PUSH BP
        MOV BP,SP
        DEC SP
        DEC SP        ;ALLOCATE SPACE FOR TEMP
        MOV AX,[BP+4] ;GET A FROM STACK
        MOV [BP-2],AX ;TEMP=A
        MOV AX,[BP+6] ;GET B FROM STACK
        MOV [BP+4],AX ;A=B
        MOV AX,[BP-2] ;GET TEMP
        MOV [BP+6],AX ;B=A
        MOV SP,BP
        POP BP
        RET WORDSIZE*2
ENDP
SWAPBYREF PROC NEAR
        PUSH BP
        MOV BP,SP
        DEC SP
        DEC SP       ;ALLOCATE SPACE FOR TEMP
        LES DI,[BP+4]
        MOV AX,[DI]
        MOV [BP-2],AX;TEMP=A
        LES DI,[BP+8]
        MOV AX,[DI]
        LES DI,[BP+4]
        MOV [DI],AX  ;A=B
        LES DI,[BP+8]
        MOV AX,[BP-2]
        MOV [DI],AX  ;B=A
        MOV SP,BP
        POP BP
        RET WORDSIZE*4
ENDP
END START

I am not quite clear with 引用调用 in C++, it seems like that call by reference is first used in Pascal.

[十八道胡同]

it seems like that call by reference is first used in Pascal.
引用传值 第一次是出现在Pascal中

[眼睛猥琐男]

[Quote=引用 1 楼 thefirstz 的回复:]

[/Quote]

#include <stdio.h>

void swap(int x,int y)//传值
{
int temp;
temp=x;
x=y;
y=temp;
}

int main()
{
int a=5,b=8;
swap(a,b);
printf("%d %d\n",a,b);
return 0;
}


#include <stdio.h>

void swap(int *x,int *y)//使用指针传递地址
{
int temp;
temp=*x;
*x=*y;
*y=temp;
}

int main()
{
int a=5,b=8;
swap(&a,&b);
printf("%d %d\n",a,b);
return 0;
}


void swap(int &x,int &y)//传引用，只有C++才有
{
int temp;
temp=x;
x=y;
y=temp;
}

[猫已经找不回了]

http://blog.csdn.net/hairetz/archive/2009/05/03/4145107.aspx

以前写的

[昵称很不好取]

#include <stdio.h>

void swap(int x,int y)//传值
{
int temp;
temp=x;
x=y;
y=temp;
}

int main()
{
int a=5,b=8;
swap(a,b);
printf("%d %d\n",a,b);
return 0;
}


#include <stdio.h>

void swap(int *x,int *y)//使用指针传递地址
{
int temp;
temp=*x;
*x=*y;
*y=temp;
}

int main()
{
int a=5,b=8;
swap(&a,&b);
printf("%d %d\n",a,b);
return 0;
}


void swap(int &x,int &y)//传引用，只有C++才有
{
int temp;
temp=x;
x=y;
y=temp;
}