锘??xml version="1.0" encoding="utf-8" standalone="yes"?> 棣栧厛鎴戜滑鏉ユ槑紜竴浜涘熀紜姒傚康 澹版槑涓庡畾涔夛細 宸﹀煎拰鍙沖鹼細 鐜板湪璁╂垜浠潵鐪嬫暟緇勫拰鎸囬拡鍦ㄨ闂笂鐨勫樊寮傘?/p>
鏁扮粍錛氭暟緇勫悕鎵琛ㄧず鐨勫湴鍧瀛樺湪浜庣鍙瘋〃涓紝鎵闇鍦板潃緙栬瘧鏃朵究鍙煡錛岀洿鎺ュ姞涓婂亸縐婚噺鍗沖彲銆?br> extern char p[]; p[3]; 鎸囬拡錛氶渶瑕佸厛寰楀埌鎸囬拡鐨勫鹼紝鐒跺悗灝嗘鍊間綔涓哄湴鍧錛屽啀鍔犱笂鍋忕Щ閲忕瓑鎿嶄綔銆?br> extern char *p; p[3]; 涔熷氨鏄錛岀紪璇戝櫒鏄牴鎹0鏄庢椂鐨勭被鍨嬫潵紜畾璁塊棶鐨勬柟寮忥紝澹版槑鍜屽畾涔夌殑涓嶄竴鑷村氨鍍忔販鐢╩alloc()鍜宒elete涓鏍峰彲鎬曪紝瀹氫箟鍜屽0鏄庡簲褰撳尮閰嶃?/p>
鍙︿竴鏂歸潰錛屼綔涓烘瀬瀹規槗娣鋒穯鐨勪袱涓蹇碉紝鏁扮粍鍜屾寚閽堝繀鐒舵湁鐩稿悓鎴栬呰鐩擱氫箣澶勶紝涓昏鏈変互涓嬩笁鐐癸細 #include <stdio.h> char ga[] = "abcdefghijklm"; void myArrayFunc(char ca[]) void myPointerFunc(char *pa) int main(int argc, char *argv[]) 鎴戝湪VC9涓嬬殑榪愯緇撴灉涓猴細 Address of ca = 0x12fe98 Address of pa = 0x12fe98 ca鍜宑a[0]鐨勫湴鍧灞呯劧涓嶅悓錛屾槸涓嶆槸寰堟湁鍑轟箮鎰忔枡鍙堝湪鎯呯悊涔嬩腑鐨勫懗閬撱?br> 璁塊棶鏁堢巼錛屼粎浠ヤ竴緇存暟緇勪負渚嬪仛涓姣斻?br> 瀹為檯鎯呭喌濡備綍鍛紵璁╂垜浠潵鐪嬬湅姹囩紪鍚с傜紪璇戝櫒鐗堟湰錛歡cc version 3.4.4 (cygming special) (gdc 0.12, using dmd 0.125) //pointer.s 灞呯劧鏄寚閽堢増鏈湪鍏抽敭鐨凩2寰幆涓墽琛岀殑鎸囦護鏁伴噺鏇村錛屾槸涓嶆槸寰堝嚭浜烘剰鏂欙紝鎵浠ワ紝鍗冧竾涓嶈浣庝及鐜頒唬緙栬瘧鍣ㄧ殑鏅烘収錛岄夋嫨鍙鎬у拰鏁堢巼閮藉崰浼樼殑鏁扮粍涓嬫爣璁塊棶鍚с?img src="http://www.shnenglu.com/CuteSoft_Client/CuteEditor/images/emsmile.gif" align=absMiddle border=0>
澹版槑 鍙互鍑虹幇澶氭錛岃〃榪板璞$殑綾誨瀷銆?br> 瀹氫箟 鍙兘鍑虹幇涓嬈★紝紜畾瀵硅薄鐨勭被鍨嬪茍鍒嗛厤鍐呭瓨銆傚畾涔夋槸涓縐嶇壒孌婄殑澹版槑錛屽洜涓虹墵涓哄璞″垎閰嶄簡鍐呭瓨銆?/p>
宸﹀?nbsp;緙栬瘧鏃跺彲鐭ワ紝琛ㄧず鐨勬槸鍙橀噺鐨勫湴鍧銆?br> 鍙沖?nbsp;榪愯鏃跺彲鐭ワ紝琛ㄧず鐨勬槸鍙橀噺鐨勫湴鍧涓殑鍐呭銆?br> 鍊煎緱娉ㄦ剰鐨勬槸錛孋璇█鍖呮嫭C++涓乏鍊煎彸鍊奸兘鍜屽父閲忔病鏈夊繀鐒惰仈緋伙紝C璇█涓繕寮曞叆浜?#8220;鍙慨鏀圭殑宸﹀?#8221;鐨勬蹇碉紝鏍囧噯瑙勫畾璧嬪兼搷浣滅宸︿晶蹇呴』涓轟竴涓彲淇敼鐨勫乏鍊箋傛寜鐓т笂闈㈢殑瀹氫箟錛屾垜浠彲浠ョ湅鍒幫紝鏁扮粍鍚嶆槸涓涓乏鍊鹼紙琛ㄧず鍦板潃錛岀紪璇戞椂鍙煡錛夛紝浣嗘槸鏄竴涓笉鍙慨鏀圭殑宸﹀鹼紝鍥犳涓嶈兘鎶婃暟緇勫悕鏀懼湪璧嬪兼搷浣滅鐨勫乏渚с?/p>
1.鍙栧緱絎﹀彿琛ㄤ腑p鐨勫湴鍧錛屽茍涓庝笅鏍囨墍琛ㄧず鐨勫亸縐婚噺鐩稿姞錛岀敓鎴愪竴涓柊鐨勫湴鍧銆?br> 2.璁塊棶涓婇潰鐨勫湴鍧錛屽彇寰楀瓧絎︼紝
鑻ユ鏃秔鐨勫畾涔変負鎸囬拡錛屽垯浼氬彇鍒版寚閽堟墍鍦ㄥ湴鍧鐨勫亸縐婚噺澶勭殑鍐呭銆?/p>
1.鍙栧緱絎﹀彿琛ㄤ腑p鐨勫湴鍧錛屾彁鍙栧瓨鍌ㄤ簬姝ゅ鐨勬寚閽堛?br> 2.鎶婁笅鏍囨墍琛ㄧず鐨勫亸縐婚噺鍜屾寚閽堢殑鍊肩浉鍔狅紝鐢熸垚涓涓湴鍧銆?br> 3.璁塊棶涓婇潰鐨勫湴鍧錛屽彇寰楀瓧絎︼紝
鑻ユ鏃秔鐨勫畾涔変負鏁扮粍錛屽垯浼氭妸涓涓猚har鍊艱В閲婁負鍦板潃鑰屽嚭閿欍?/p>
1.琛ㄨ揪寮忎腑鐨勬暟緇勫悕琚紪璇戝櫒褰撲綔涓涓寚鍚戣鏁扮粍絎竴涓厓绱犵殑鎸囬拡銆?br> 2.涓嬫爣鎬誨拰鎸囬拡鐨勫亸縐婚噺鐩稿悓銆?br> 瀵規暟緇勭殑寮曠敤渚嬪a[i]鎬繪槸浼氳緙栬瘧鍣ㄦ敼鍐欎負*(a+i)錛岃繖鏄爣鍑嗚瀹氱殑緙栬瘧鍣ㄥ繀欏誨叿鏈夌殑姒傚康鎬ц涓恒?br> 3.鍦ㄥ嚱鏁板弬鏁扮殑澹版槑涓紝鏁扮粍鍚嶈緙栬瘧鍣ㄥ綋浣滄寚鍚戣鏁扮粍絎竴涓厓绱犵殑鎸囬拡銆?br> 鍏充簬榪欐潯錛屾湁孌墊尯鏈夋剰鎬濈殑灝忕▼搴忓彲浠ラ獙璇併?/p>
{
printf("Address of ca = %#x\n", &ca);
printf("Address of (ca[0]) = %#x\n\n", &(ca[0]));
}
{
printf("Address of pa = %#x\n", &pa);
printf("Address of (pa[0]) = %#x\n\n", &(pa[0]));
}
{
printf("Address of ga = %#x\n", &ga);
printf("Address of (ga[0]) = %#x\n\n", &(ga[0]));
myArrayFunc(ga);
myPointerFunc(ga);
return 0;
}
Address of ga = 0x417000
Address of (ga[0]) = 0x417000
Address of (ca[0]) = 0x417000
Address of (pa[0]) = 0x417000
OK,涓よ呭湪姒傚康灞傞潰涓婄殑寮傚悓鍩烘湰灝辨槸涓婇潰榪欎簺浜嗭紝鏈鍚庤皥璋堟晥鐜囥?/p>
//array.c
void array()
{
int a[10];
int i;
for(i = 0; i < 10; ++i)
{
a[i] = 0;
}
}
//pointer.c
void pointer()
{
int a[10];
int *p = a;
int i;
for (i = 0; i < 10; ++i)
{
*p++ = 0;
}
}
浠庣悊璁轟笂鏉ヨ錛宎rray.c涓殑a[i] = 0;浼氳鏀瑰啓涓?(a+i) = 0錛屾敞鎰忓寘鍚姝ラ暱鐨勮皟鏁達紝涔熷氨鏄細鍑虹幇涔樻硶鎴栬呯Щ浣嶈繍綆楋紝鑰宲ointer.c涓粎浠呴渶瑕佸皢鎸囬拡鐨勫煎姞1鍗沖彲錛岀敤鎸囬拡璁塊棶鐨勬晥鐜囨洿楂樸?/p>
//array.s
.file "array.c"
.text
.globl _array
.def _array; .scl 2; .type 32; .endef
_array:
pushl %ebp
movl %esp, %ebp
subl $72, %esp
movl $0, -60(%ebp)
L2:
cmpl $9, -60(%ebp)
jg L1
movl -60(%ebp), %eax
movl $0, -56(%ebp,%eax,4)
leal -60(%ebp), %eax
incl (%eax)
jmp L2
L1:
leave
ret
.file "pointer.c"
.text
.globl _pointer
.def _pointer; .scl 2; .type 32; .endef
_pointer:
pushl %ebp
movl %esp, %ebp
subl $72, %esp
leal -56(%ebp), %eax
movl %eax, -60(%ebp)
movl $0, -64(%ebp)
L2:
cmpl $9, -64(%ebp)
jg L1
movl -60(%ebp), %eax
movl $0, (%eax)
leal -60(%ebp), %eax
addl $4, (%eax)
leal -64(%ebp), %eax
incl (%eax)
jmp L2
L1:
leave
ret
]]>
涓嬮潰榪欐綆鍗曠殑浠g爜
#include <stdio.h>
int main(int argc, char *argv[])
{
printf("%d\n", sizeof('A'));
return 0;
}
鐢╣cc緙栬瘧鍚庤繍琛岀粨鏋滀負4錛岀敤g++緙栬瘧鍚庤繍琛岀粨鏋滀負1銆?br>
璇存槑C璇█涓粯璁ゆ妸鍗曞瓧絎﹁涓篿nt錛屼篃灝辨槸sizeof ('A')榛樿鍜宻izeof(65)絳夊悓錛屽姞涓婂己鍒剁被鍨嬭漿鎹izeof((char)'A')杈撳嚭鐨勫氨鏄湡鏈涚粨鏋?銆?br>
C++涓湅鏉ラ粯璁ゆ妸鍗曞瓧絎﹀氨浣滀負涓涓猚har澶勭悊錛屾瘮杈冪鍚堢洿瑙夋劅鍙椼?img src="http://www.shnenglu.com/CuteSoft_Client/CuteEditor/images/emsmile.gif" align=absMiddle border=0>