while,do..whlie和for循环

循环指令	结构	说明
while	while（表达式）{语句；}	计算while后面括号里表达式的值，若其结果非0，则执行循环，否则不执行
do…while	do{语句；}while（表达式）；	先执行一次语句,然后计算while后面括号里表达式的值，若其结果非0，则执行循环，否则不执行
for	for(表达式1;表达式2;表达式3) 或 for( ; ; )	for循环主要判断表达式2是否成立,表达式2成立则继续循环,不成立则跳出循环,for( ; ; )表达式2默认为真,一直循环

while:

void Function()
{
	int b = 0;
	int a = 0;
	while(a<=5)
	{
		b++;
		a++;
	}
}

0040C3B8   mov         dword ptr [ebp-4],0		b = 0
0040C3BF   mov         dword ptr [ebp-8],0		a = 0
0040C3C6   cmp         dword ptr [ebp-8],5      if(a <= 5)
0040C3CA   jg          fu+40h (0040c3e0)		若ebp-8大于5则跳出循环部分
0040C3CC   mov         eax,dword ptr [ebp-4]	eax = b = 0
0040C3CF   add         eax,1					eax = eax + 1
0040C3D2   mov         dword ptr [ebp-4],eax	b = eax = 1
0040C3D5   mov         ecx,dword ptr [ebp-8]	ecx = a = 0
0040C3D8   add         ecx,1					ecx = ecx + 1
0040C3DB   mov         dword ptr [ebp-8],ecx	a = ecx = 1
0040C3DE   jmp         fu+26h (0040c3c6)        强制跳转到0040c3c6

do…while:

void Function()
{
	int a = 0;
	int b = 0;
	do
	{
		b++;
		a++;
	}while(a <= 5);
}

0040C3B8   mov         dword ptr [ebp-4],0
0040C3BF   mov         dword ptr [ebp-8],0
0040C3C6   mov         eax,dword ptr [ebp-8]
0040C3C9   add         eax,1
0040C3CC   mov         dword ptr [ebp-8],eax
0040C3CF   mov         ecx,dword ptr [ebp-4]
0040C3D2   add         ecx,1
0040C3D5   mov         dword ptr [ebp-4],ecx
0040C3D8   cmp         dword ptr [ebp-4],5
0040C3DC   jle         Function+26h (0040c3c6)

---

for

0040C3B8   mov         dword ptr [ebp-4],0		b = 0
0040C3BF   mov         dword ptr [ebp-8],0		a = 0
0040C3C6   jmp         Function+31h (0040c3d1)	跳转到0040C3D1  (i<9)
0040C3C8   mov         eax,dword ptr [ebp-8]
0040C3CB   add         eax,1
0040C3CE   mov         dword ptr [ebp-8],eax
0040C3D1   cmp         dword ptr [ebp-8],9		a=0 和 9 比较
0040C3D5   jge         Function+42h (0040c3e2)	若大于等于则跳转到0040c3e2(跳出循环)
0040C3D7   mov         ecx,dword ptr [ebp-4]	ecx = b
0040C3DA   add         ecx,1					b = b+1
0040C3DD   mov         dword ptr [ebp-4],ecx	b=ecx
0040C3E0   jmp         Function+28h (0040c3c8)	跳转到0040c3c8(i++)

来源：CSDN

作者：初级猿人

链接：https://blog.csdn.net/qq_34250536/article/details/103951312