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聽 DES鏄疍ata Encryption Standard錛堟暟鎹姞瀵嗘爣鍑嗭級鐨勭緝鍐欍傚畠鏄敱IBM鍏徃鐮斿埗鐨勪竴縐嶅姞瀵嗙畻娉曪紝緹庡浗鍥藉鏍囧噯灞浜?977騫村叕甯冩妸瀹冧綔涓洪潪鏈鴻閮ㄩ棬浣跨敤鐨勬暟鎹姞瀵嗘爣鍑嗭紝浜屽崄騫存潵錛屽畠涓鐩存椿璺冨湪鍥介檯淇濆瘑閫氫俊鐨勮垶鍙頒笂錛屾壆婕斾簡鍗佸垎閲嶈鐨勮鑹瞇10]銆?br />聽 DES鏄竴涓垎緇勫姞瀵嗙畻娉曪紝浠栦互64浣嶄負鍒嗙粍瀵規(guī)暟鎹姞瀵嗐傚悓鏃禗ES涔熸槸涓涓縐扮畻娉曪細鍔犲瘑鍜岃В瀵嗙敤鐨勬槸鍚屼竴涓畻娉曘傚畠鐨勫瘑鍖欓暱搴︽槸56浣嶏紙鍥犱負姣忎釜絎?浣嶉兘鐢ㄤ綔濂囧伓鏍¢獙錛夛紝瀵嗗寵鍙互鏄換鎰忕殑56浣嶇殑鏁幫紝鑰屼笖鍙互浠繪剰鏃跺欐敼鍙樸傚叾涓湁鏋佸皯閲忕殑鏁拌璁や負鏄急瀵嗗寵錛屼絾鏄緢瀹規(guī)槗閬垮紑浠栦滑銆傛墍浠ヤ繚瀵嗘т緷璧栦簬瀵嗛挜銆?br /> 2 綆楁硶妗嗘灦[11]錛?br />聽 DES瀵?4(bit)浣嶇殑鏄庢枃鍒嗙粍M榪涜鎿嶄綔錛孧緇忚繃涓涓垵濮嬬疆鎹P緗崲鎴恗0錛屽皢m0鏄庢枃鍒嗘垚宸﹀崐閮ㄥ垎鍜屽彸鍗婇儴鍒唌0=(L0,R0)錛屽悇32浣嶉暱銆傜劧鍚庤繘琛?6杞畬鍏ㄧ浉鍚岀殑榪愮畻錛岃繖浜涜繍綆楄縐頒負鍑芥暟f錛屽湪榪愮畻榪囩▼涓暟鎹笌瀵嗗寵緇撳悎銆傜粡榪?6杞悗錛屽乏錛屽彸鍗婇儴鍒嗗悎鍦ㄤ竴璧風粡榪囦竴涓湯緗崲錛岃繖鏍峰氨瀹屾垚浜哰12]銆?br />聽 鍦ㄦ瘡涓杞腑錛屽瘑鍖欎綅縐諱綅錛岀劧鍚庡啀浠庡瘑鍖欑殑56浣嶄腑閫夊嚭48浣嶃傞氳繃涓涓墿灞曠疆鎹㈠皢鏁版嵁鐨勫彸鍗婇儴鍒嗘墿灞曟垚48浣嶏紝騫墮氳繃涓涓紓鎴栨搷浣滄浛浠f垚鏂扮殑32浣嶆暟鎹紝鍦ㄥ皢鍏剁疆鎹㈡崲涓嬈°傝繖鍥涙榪愮畻鏋勬垚浜嗗嚱鏁癴銆傜劧鍚庯紝閫氳繃鍙︿竴涓紓鎴栬繍綆楋紝鍑芥暟f鐨勮緭鍑轟笌宸﹀崐閮ㄥ垎緇撳悎錛屽叾緇撴灉鎴愪負鏂扮殑鍙沖崐閮ㄥ垎錛屽師鏉ョ殑鍙沖崐閮ㄥ垎鎴愪負鏂扮殑宸﹀崐閮ㄥ垎銆傚皢璇ユ搷浣滈噸澶?6嬈★紝灝卞疄鐜頒簡銆傚叿浣撳浘4鎵紺恒?br />
聽聽聽聽聽
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 鍥?銆DES綆楁硶妗嗗浘 3 DES瑙e瘑
聽 鍦ㄧ粡榪囨墍鏈夌殑浠f浛銆佺疆鎹€佸紓鎴栫洅寰幆涔嬪悗錛屼綘涔熻璁や負瑙e瘑綆楁硶涓庡姞瀵嗙畻娉曞畬鍏ㄤ笉鍚屻傛伆鎭扮浉鍙嶏紝緇忚繃綺懼績閫夋嫨鐨勫悇縐嶆搷浣滐紝鑾峰緱浜嗕竴涓潪甯告湁鐢ㄧ殑鎬ц川錛氬姞瀵嗗拰瑙e瘑浣跨敤鐩稿悓鐨勭畻娉曘?br />DES鍔犲瘑鍜岃В瀵嗗敮涓鐨勪笉鍚屾槸瀵嗗寵鐨勬搴忕浉鍙嶃傚鏋滃悇杞姞瀵嗗瘑鍖欏垎鍒槸K1,K2,K3鈥?K16閭d箞瑙e瘑瀵嗗寵灝辨槸K16,K15,K14鈥1銆?br /> 4 DES鐨勫嚑縐嶅伐浣滄柟寮?/font>
聽 絎竴縐嶇數(shù)瀛愬瘑鏈柟寮忥紙ECB錛?/font>
聽聽 灝嗘槑鏂囧垎鎴恘涓?4姣旂壒鍒嗙粍錛屽鏋滄槑鏂囬暱搴︿笉鏄?4姣旂壒鐨勫嶆暟錛屽垯鍦ㄦ槑鏂囨湯灝懼~鍏呴傚綋鏁扮洰鐨勮瀹氱鍙楓傚鏄庢枃緇勭敤緇欏畾鐨勫瘑閽ュ垎鍒繘琛屽姞瀵嗭紝琛屽瘑鏂嘋=(C0,C1,鈥︹?Cn-1)鍏朵腑Ci=DES(K,xi),i=0,1,鈥?.,n-1銆?br />聽 絎簩縐嶅瘑鏂囧垎緇勯摼鎺ユ柟寮忥紙CBC錛?/font>
聽聽 鍦–BC鏂瑰紡涓嬶紝姣忎釜鏄庢枃緇剎i鍦ㄥ姞瀵嗗墠涓庡厛涓緇勫瘑鏂囨寜浣嶆ā浜屽姞鍚庯紝鍐嶉佸埌DES鍔犲瘑錛孋BC鏂瑰紡鍏嬫湇浜咵CB鏂瑰紡鎶ュ唴緇勯噸鐨勭己鐐癸紝浣嗙敱浜庢槑鏂囩粍鍔犲瘑鍓嶄笌涓緇勫瘑鏂囨湁鍏籌紝鍥犳鍓嶄竴緇勫瘑鏂囩殑閿欒浼氫紶鎾埌涓嬩竴緇勩?br />聽 絎笁縐嶅瘑鏂囧弽棣堟柟寮忥紙CFB錛夛紝鍙敤浜庡簭鍒楀瘑鐮?/font>
聽聽 鏄庢枃X錛?x0,x1,鈥︹?xn-1)錛屽叾涓瓁i鐢眛涓瘮鐗圭粍鎴?
聽聽 涓嶤FB鍞竴涓嶅悓鐨勬槸OFB鏄洿鎺ュ彇DES杈撳嚭鐨則涓瘮鐗癸紝鑰屼笉鏄彇瀵嗘枃鐨則涓瘮鐗癸紝鍏朵綑閮戒笌CFB鐩稿悓銆備絾瀹冨彇鐨勬槸DES鐨勮緭鍑猴紝鎵浠ュ畠鍏嬫湇浜咰FB鐨勫瘑鏂囬敊璇紶鎾殑緙虹偣
]]>
闂涓錛?nbsp; 紼嬪簭緙栬瘧閫氳繃錛屼絾榪愯閿欒鎻愮ず濡備笅錛?BR> scanf : floating point formats not linked
Abnormal program termination
鍑洪敊紺轟緥紼嬪簭錛?/P>
#include <stdio.h>
int main(void)
{
int i,j ;
float s[3][3];
/*榪欓噷*/
for(i=0;i<3;i++)
for(j=0;j<3;j++)
scanf("%f",&s[i][j]);
for(i=0;i<3;i++)
for(j=0;j<3;j++)
printf("%f",s[i][j]);
}
榪欏疄闄呬笂鏄釜涓庢湰鏂囦富棰樻棤鍏崇殑闂錛屼篃鏄笌scanf()鍑芥暟鏃犲叧錛屾槸緙栬瘧鍣ㄧ殑闂銆?/P>
鍘熷洜寰堟槑紜細娌℃湁閾炬帴嫻偣搴撱傛棭鏈熺郴緇熷唴瀛樿祫婧愮揣寮狅紝澶氱淮嫻偣鏁扮粍鍗犵敤鍐呭瓨閲忓ぇ錛堜竴緇存誕鐐規(guī)暟緇勫氨娌℃湁姝ら棶棰橈級錛屽洜姝C鍦ㄧ紪璇戞椂灝介噺涓嶅姞鍏ユ棤鍏崇殑閮ㄥ垎錛屽湪娌″彂鐜伴渶瑕佹誕鐐硅漿鎹㈢▼搴忔椂錛屽氨涓嶅湪鍙墽琛岀▼搴忎腑瀹夎榪欎釜閮ㄥ垎銆傝屾湁鏃禩C鍙堜笉鑳芥紜瘑鍒疄闄呬笂紜疄闇瑕佸仛嫻偣杞崲錛屽洜姝ゅ氨浼氬嚭鐜頒笂闈㈤敊璇?/P>
瑙e喅鐨勬柟娉曪細鍛婅瘔TC闇瑕佸仛嫻偣鏁扮殑杈撳叆杞崲銆傚皢浠ヤ笅璇彞鍔犲叆涓婇潰紼嬪簭涓爣鏈?*榪欓噷*/澶勩?/P>
鏂規(guī)硶涓: float c;
scanf("%f",&c);
鏂規(guī)硶浜? float c,*t;//姝ゅ鎵嬭錛岀幇宸叉洿姝?amp;t===銆?t;
t=&c;
.....
涔熷氨鏄錛岀紪璇戝櫒鍙鏈夋誕鐐硅漿鎹㈢殑綰跨儲錛孴C灝變細鎶婃誕鐐硅漿鎹㈣繛涓?鎵浠ヤ竴鑸ぇ涓鐐圭殑紼嬪簭閲岀殑灝變細鏈夋誕鐐瑰彉閲忓弽鑰屾病鏈夋闂銆?BR>
浣嗛棶棰樺埌姝ゅ茍娌$粨鏉燂紝鎴戝湪涓婇潰鏈夊彞鈥滀竴緇存誕鐐規(guī)暟緇勫氨娌℃湁姝ら棶棰樷濓紝閭d箞鎴戜滑鏉ョ湅鐪嬭繖鏍瘋涓嶈錛?/P>
#include <stdio.h>
int main(void)
{
int i,j ;
float s[3][3],*ptr;
ptr=&s[0][0];
for(i=0;i<3;i++)
for(j=0;j<3;j++)
scanf("%f",ptr+i*3+j);
for(i=0;i<3;i++)
for(j=0;j<3;j++)
printf("%7.2f\n",s[i][j]);
}
榪欐牱鎴戜滑灝辨妸澶氱淮嫻偣鏁扮粍闄嶄負涓緇存誕鐐規(guī)暟緇勬潵澶勭悊錛岃皟璇曚竴涓嬶紝紼嬪簭榪愯姝e父銆傝繖璇存槑TC緙栬瘧鍣ㄤ粎鍦ㄥ鐞嗗緇存誕鐐規(guī)暟緇勶紙緇撴瀯浣擄級鏈夋鈥滄湭閾炬帴嫻偣搴撯濈殑闂銆?/P>
闂浜岋細scanf()鍑芥暟涓嶈兘姝g‘鎺ュ彈鏈夌┖鏍肩殑瀛楃涓詫紵濡? I love you!
#include <stdio.h>
int main()
{
char str[80];
scanf("%s",str);
printf("%s",str);
return 0;
}
杈撳叆錛欼 live you!
杈撳嚭錛欼
scanf()鍑芥暟鎺ユ敹杈撳叆鏁版嵁鏃訛紝閬囦互涓嬫儏鍐電粨鏉熶竴涓暟鎹殑杈撳叆錛氾紙涓嶆槸緇撴潫璇canf鍑芥暟錛宻canf鍑芥暟浠呭湪姣忎竴涓暟鎹煙鍧囨湁鏁版嵁錛屽茍鎸夊洖杞﹀悗緇撴潫錛夈?BR> 鈶?閬囩┖鏍箋佲滃洖杞︹濄佲滆煩鏍尖濋敭銆?BR> 鈶?閬囧搴︾粨鏉熴?BR> 鈶?閬囬潪娉曡緭鍏ャ?/P>
鎵浠ワ紝涓婅堪紼嬪簭騫朵笉鑳借揪鍒伴鏈熺洰鐨勶紝scanf()鎵弿鍒?I"鍚庨潰鐨勭┖鏍煎氨璁や負瀵箂tr鐨勮祴鍊肩粨鏉燂紝騫跺拷鐣ュ悗闈㈢殑"love you!".榪欓噷瑕佹敞鎰忔槸"love you!"榪樺湪閿洏緙撳啿鍖?/FONT>錛堝叧浜庤繖涓棶棰橈紝緗戜笂鎴戞墍瑙佺殑璇存硶閮芥槸濡傛錛屼絾鏄紝鎴戠粡榪囪皟璇曞彂鐜幫紝鍏跺疄榪欐椂緙撳啿鍖哄瓧絎︿覆棣栧熬鎸囬拡宸茬粡鐩哥瓑浜嗭紝涔熷氨鏄緙撳啿鍖烘竻絀轟簡錛宻canf()鍑芥暟搴旇鍙槸鎵弿stdin嫻侊紝榪欎釜孌嬪瓨淇℃伅鏄湪stdin涓?銆傛垜浠敼鍔ㄤ竴涓嬩笂闈㈢殑紼嬪簭鏉ラ獙璇佷竴涓嬶細
#include <stdio.h>
int main()
{
char str[80];
char str1[80];
char str2[80];
scanf("%s",str);/*姝ゅ杈撳叆:I love you! */
printf("%s",str);
sleep(5);/*榪欓噷絳夊緟5縐?鍛婅瘔浣犵▼搴忚繍琛屽埌浠涔堝湴鏂?/
scanf("%s",str1);/*榪欎袱鍙ユ棤闇浣犲啀杈撳叆,鏄閿洏鐩樼紦鍐插尯鍐嶆壂鎻?nbsp; */
scanf("%s",str2);/*榪欎袱鍙ユ棤闇浣犲啀杈撳叆,鏄閿洏鐩樼紦鍐插尯鍐嶆壂鎻?nbsp; */
printf("\n%s",str1);
printf("\n%s",str2);
return 0;
}
杈撳叆錛欼 love you!
杈撳嚭錛欼
love
you!
濂戒簡錛屽師鍥犵煡閬撲簡錛岄偅涔坰canf()鍑芥暟鑳戒笉鑳藉畬鎴愯繖涓換鍔★紵鍥炵瓟鏄細鑳斤紒鍒繕浜唖canf()鍑芥暟榪樻湁涓涓?%[] 鏍煎紡鎺у埗絎︼紙濡傛灉瀵?[]涓嶄簡瑙g殑璇鋒煡鐪嬫湰鏂囩殑涓婄瘒錛?璇風湅涓嬮潰鐨勭▼搴忥細
#include "stdio.h"
int main()
{
char string[50];
/*scanf("%s",string);涓嶈兘鎺ユ敹絀烘牸絎?/
scanf("%[^\n]",string);
printf("%s\n",string);
return 0;
}
闂涓夛細閿洏緙撳啿鍖烘畫浣欎俊鎭棶棰?/FONT>
#include <stdio.h>
int main()
{
int a;
char c;
do
{
scanf("%d",&a);
scanf("%c",&c);
printf("a=%d c=%c\n",a,c);
/*printf("c=%d\n",c);*/
}while(c!='N');
}
scanf("%c",&c);榪欏彞涓嶈兘姝e父鎺ユ敹瀛楃,浠涔堝師鍥犲憿錛熸垜浠敤printf("c=%d\n",c);灝咰鐢╥nt琛ㄧず鍑烘潵錛屽惎鐢╬rintf("c=%d\n",c);榪欎竴鍙ワ紝鐪嬬湅scanf()鍑芥暟璧嬬粰C鍒板簳鏄粈涔堬紝緇撴灉鏄?c=10 ,ASCII鍊間負10鏄粈涔堬紵鎹㈣鍗砛n.瀵逛簡錛屾垜浠瘡鍑繪墦涓涓?Enter"閿紝鍚戦敭鐩樼紦鍐插尯鍙戝幓涓涓滃洖杞︹?\r),涓涓滄崲琛?(\n),鍦ㄨ繖閲孿r琚玸canf()鍑芥暟澶勭悊鎺変簡錛堝涓旇繖涔堣涓哄惂^_^錛夛紝鑰孿n琚玸canf()鍑芥暟鈥滈敊璇濆湴璧嬬粰浜哻.
瑙e喅鍔炴硶錛氬彲浠ュ湪涓や釜scanf()鍑芥暟涔嬪悗鍔犱釜fflush(stdin);錛岃繕鏈夊姞getch(); getchar();涔熷彲浠ワ紝浣嗘槸瑕佽鍏蜂綋scanf()璇彞鍔犻偅涓紝榪欓噷灝變笉鍒嗘瀽浜嗭紝璇昏呰嚜宸卞幓鎽哥儲鍚с備絾鏄姞fflush(stdin);涓嶇浠涔堟儏鍐甸兘鍙銆?/P>
鍑芥暟鍚? fflush
鍔?nbsp; 鑳? 娓呴櫎涓涓祦
鐢?nbsp; 娉? int fflush(FILE *stream);
#include <stdio.h>
int main()
{
int a;
char c;
do
{
scanf("%d",&a);
fflush(stdin);
scanf("%c",&c);
fflush(stdin);
printf("a=%d c=%c\n",a,c);
}while(c!='N');
}
榪欓噷鍐嶇粰涓涓敤鈥滅┖鏍肩鈥濇潵澶勭悊緙撳啿鍖烘畫浣欎俊鎭殑紺轟緥錛?/P>
榪愯鍑洪敊鐨勭▼搴忥細
#include <stdio.h>
int main()
{
int i;
char j;
for(i = 0;i < 10;i++)
{
scanf("%c",&j);/*榪欓噷%鍓嶆病鏈夌┖鏍?/
}
}
浣跨敤浜嗙┖鏍兼帶鍒剁鍚庯細
#include <stdio.h>
int main()
{
int i;
char j;
for(i = 0;i < 10;i++)
{
scanf(" %c",&j);/*娉ㄦ剰榪欓噷%鍓嶆湁涓┖鏍?/
}
}
鍙互榪愯鐪嬬湅涓や釜紼嬪簭鏈変粈涔堜笉鍚屻?/P>
闂鍥?nbsp; 濡備綍澶勭悊scanf()鍑芥暟璇緭鍏ラ犳垚紼嬪簭姝婚攣鎴栧嚭閿欙紵
#include <stdio.h>
int main()
{
int a,b,c; /*璁$畻a+b*/
scanf("%d,%d",&a,&b);
c=a+b;
printf("%d+%d=%d",a,b,c);
}
濡備笂紼嬪簭錛屽鏋滄紜緭鍏,b鐨勫鹼紝閭d箞娌′粈涔堥棶棰橈紝浣嗘槸錛屼綘涓嶈兘淇濊瘉浣跨敤鑰呮瘡涓嬈¢兘鑳芥紜緭鍏ワ紝涓鏃﹁緭鍏ヤ簡閿欒鐨勭被鍨嬶紝浣犵殑紼嬪簭涓嶆槸姝婚攣錛屽氨鏄緱鍒頒竴涓敊璇殑緇撴灉,鍛靛懙錛岃繖鍙兘鎵鏈変漢閮介亣鍒拌繃鐨勯棶棰樺惂錛?/P>
瑙e喅鏂規(guī)硶錛歴canf()鍑芥暟鎵ц鎴愬姛鏃剁殑榪斿洖鍊兼槸鎴愬姛璇誨彇鐨勫彉閲忔暟,涔熷氨鏄錛屼綘榪欎釜scanf()鍑芥暟鏈夊嚑涓彉閲忥紝濡傛灉scanf()鍑芥暟鍏ㄩ儴姝e父璇誨彇錛屽畠?yōu)p繑鍥炲嚑銆備絾榪欓噷榪樿娉ㄦ剰鍙︿竴涓棶棰橈紝濡傛灉杈撳叆浜嗛潪娉曟暟鎹紝閿洏緙撳啿鍖哄氨鍙兘榪樹釜鏈夋畫浣欎俊鎭棶棰樸?/P>
姝g‘鐨勪緥紼嬶細
#include <stdio.h>
int main()
{
int a,b,c; /*璁$畻a+b*/
while(scanf("%d,%d",&a,&b)!=2)fflush(stdin);
c=a+b;
printf("%d+%d=%d",a,b,c);
}
灝辨緇撴潫姝ゆ枃鍚?鏈鍚庤繕寰楃収渚嬭唉铏氬嚑鍙?鏈漢姘村鉤鏈夐檺(鐨勭殑紜‘鏈夐檺^_^,榪欏埌鏄湡璇?,璋闅懼厤榪樻湜杈句漢鎸囩偣涓浜?鍦ㄤ笅鍦ㄦ璋㈣繃浜?
(鍏ㄦ枃瀹?
knocker 2004.10.21
scanf()鍑芥暟鏄墍鏈塁璇█瀛︿範鑰呭湪瀛︿範C璇█榪囩▼涓墍閬囧埌鐨勭浜屼釜鍑芥暟錛堢涓涓嚱鏁版槸printf(),Brian W.Kerninghan & Dennis M.Ritchie鐨勨渉ello,world鈥濈▼搴忓熀鏈笂鏄墍鏈夌殑C璇█瀛︿範鑰呯涓涓寖渚嬶級錛屾墍浠canf()鍑芥暟搴斿綋鏄疌瀛︿範鑰呰兘鐔熺粌榪愮敤鐨勪竴涓嚱鏁幫紝浣嗘湁寰堝鍒濆鑰呭姝ゅ嚱鏁頒笉鑳藉緢濂界殑榪愮敤錛屽湪瀹為檯緙栫▼涓敊璇嬌鐢╯canf()鍑芥暟錛屽鑷崇▼搴忎駭鐢熸煇縐嶉敊璇笉鑳芥甯歌繍琛岋紝浠ヨ嚦浜х敓鈥渟canf()鍑芥暟鏈塀UG鈥濓紝鈥渟canf()鍑芥暟鏃犵敤璁衡濈瓑絳夐敊璇鐐廣?BR> 鏈枃緇撳悎絎旇呭湪緙栫▼瀹炶返涓強璁哄潧涓婄綉鍙嬫墍閬囧埌鐨勯棶棰樹綔涓閲婄枒錛屼絾絎旇呮按騫蟲湁闄愶紙鑿滈笩綰э級錛岄毦鍏嶆湁璋涔嬪錛岃繕鏈涜揪浜烘寚鐐逛竴浜屻傦紙Email:knocker.k@126.com)
鏈枃鍒嗕笂錛屼笅涓ょ瘒璁茶堪浜咰璇█涓殑scanf()鍑芥暟鐨勭敤娉曪紝閲嶇偣闃愯堪浣跨敤scanf()鍑芥暟榪囩▼涓嚭鐜扮殑甯歌閿欒鍙婂絳栥傚綋鐒訛紝鏂囦腑鏌愪簺瑙e喅鏂規(guī)硶錛屽潎鍙互閲囩敤鍏朵粬鍑芥暟鍜屾柟娉曟潵鏇村ソ鍦拌В鍐籌紝浣嗘湰鏂囦粎闄愯璁簊canf()鍑芥暟鏈韓銆?BR> 涓婄瘒錛岃緇嗕粙緇嶄簡scanf()鍑芥暟鎺у埗涓茬殑鏋勬垚銆備笅綃囷紝鐢ㄥ疄闄呬緥紼嬩粙緇峴canf()鍑芥暟鎺у埗涓茶繍鐢ㄥ嚭鐜扮殑甯歌閿欒鍙婂絳栨妧宸с?/P>
浜屻乻canf()鍑芥暟鐨勬帶鍒朵覆
鍑芥暟鍚? scanf
鍔?nbsp; 鑳? 鎵ц鏍煎紡鍖栬緭鍏?
鐢?nbsp; 娉? int scanf(char *format[,argument,...]);
scanf()鍑芥暟鏄氱敤緇堢鏍煎紡鍖栬緭鍏ュ嚱鏁幫紝瀹冧粠鏍囧噯杈撳叆璁懼(閿洏) 璇誨彇杈撳叆鐨勪俊鎭傚彲浠ヨ鍏ヤ換浣曞浐鏈夌被鍨嬬殑鏁版嵁騫惰嚜鍔ㄦ妸鏁板煎彉鎹㈡垚閫傚綋鐨勬満鍐呮牸寮忋?/P>
鍏惰皟鐢ㄦ牸寮忎負: scanf("<鏍煎紡鍖栧瓧絎︿覆>"錛?lt;鍦板潃琛?gt;);
scanf()鍑芥暟榪斿洖鎴愬姛璧嬪肩殑鏁版嵁欏規(guī)暟錛屽嚭閿欐椂鍒欒繑鍥濫OF銆?/P>
鍏舵帶鍒朵覆鐢變笁綾誨瓧絎︽瀯鎴愶細
1銆傛牸寮忓寲璇存槑絎︼紱
2銆傜┖鐧界錛?BR>3銆傞潪絀虹櫧絎︼紱
錛圓錛?nbsp; 鏍煎紡鍖栬鏄庣
鏍煎紡瀛楃 璇存槑
%a 璇誨叆涓涓誕鐐瑰?浠匔99鏈夋晥)
%A 鍚屼笂
%c 璇誨叆涓涓瓧絎?BR>%d 璇誨叆鍗佽繘鍒舵暣鏁?BR>%i 璇誨叆鍗佽繘鍒訛紝鍏繘鍒訛紝鍗佸叚榪涘埗鏁存暟
%o 璇誨叆鍏繘鍒舵暣鏁?BR>%x 璇誨叆鍗佸叚榪涘埗鏁存暟
%X 鍚屼笂
%c 璇誨叆涓涓瓧絎?BR>%s 璇誨叆涓涓瓧絎︿覆
%f 璇誨叆涓涓誕鐐規(guī)暟
%F 鍚屼笂
%e 鍚屼笂
%E 鍚屼笂
%g 鍚屼笂
%G 鍚屼笂
%p 璇誨叆涓涓寚閽?BR>%u 璇誨叆涓涓棤絎﹀彿鍗佽繘鍒舵暣鏁?BR>%n 鑷蟲宸茶鍏ュ肩殑絳変環(huán)瀛楃鏁?BR>%[] 鎵弿瀛楃闆嗗悎
%% 璇?絎﹀彿
闄勫姞鏍煎紡璇存槑瀛楃琛?/P>
淇グ絎?nbsp; 璇存槑
L/l 闀垮害淇グ絎?nbsp; 杈撳叆"闀?鏁版嵁
h 闀垮害淇グ絎?nbsp; 杈撳叆"鐭?鏁版嵁
W 鏁村瀷甯告暟 鎸囧畾杈撳叆鏁版嵁鎵鍗犲搴?BR>* 鏄熷彿 絀鴻涓涓暟鎹?
hh,ll鍚屼笂h,l浣嗕粎瀵笴99鏈夋晥銆?/P>
錛圔錛?nbsp; 絀虹櫧瀛楃
絀虹櫧瀛楃浼氫嬌scanf()鍑芥暟鍦ㄨ鎿嶄綔涓暐鍘昏緭鍏ヤ腑鐨勪竴涓垨澶氫釜絀虹櫧瀛楃錛岀┖鐧界鍙互鏄痵pace,tab,newline絳夌瓑錛岀洿鍒扮涓涓潪絀虹櫧絎﹀嚭鐜頒負姝€?/P>
錛圕錛?nbsp; 闈炵┖鐧藉瓧絎?
涓涓潪絀虹櫧瀛楃浼氫嬌scanf()鍑芥暟鍦ㄨ鍏ユ椂鍓旈櫎鎺変笌榪欎釜闈炵┖鐧藉瓧絎︾浉鍚岀殑瀛楃銆?
娉細scanf()鎺у埗涓茬煡璇嗗氨浠嬬粛鍒拌繖閲岋紙搴旇姣旇緝榻愬叏浜哵_^)錛屽鏈夐仐婕忎笅嬈¤ˉ涓娿備笅闈㈠皢緇撳悎瀹為檯渚嬬▼錛屼竴涓闃愯堪.
涓夈乻canf()鍑芥暟鐨勬帶鍒朵覆鐨勪嬌鐢?/FONT>
渚?.
#include "stdio.h"
int main(void)
{
int a,b,c;
scanf("%d%d%d",&a,&b,&c);
printf("%d,%d,%d\n",a,b,c);
return 0;
}
榪愯鏃舵寜濡備笅鏂瑰紡杈撳叆涓変釜鍊鹼細
3鈻?鈻?銆鈫欙紙杈撳叆a,b,c鐨勫鹼級
3錛?錛? 錛坧rintf杈撳嚭鐨刟錛宐錛宑鐨勫鹼級
錛?錛?&a銆?amp;b銆?amp;c涓殑&鏄湴鍧榪愮畻絎︼紝鍒嗗埆鑾峰緱榪欎笁涓彉閲忕殑鍐呭瓨鍦板潃銆?BR> 錛?錛?"%d%d%d"鏄寜鍗佽繘鍊兼牸寮忚緭鍏ヤ笁涓暟鍊箋傝緭鍏ユ椂錛屽湪涓や釜鏁版嵁涔嬮棿鍙互鐢ㄤ竴涓垨澶氫釜絀烘牸銆乼ab閿佸洖杞﹂敭鍒嗛殧銆?BR> 浠ヤ笅鏄悎娉曡緭鍏ユ柟寮忥細
鈶?3鈻♀枴4鈻♀枴鈻♀枴5鈫?BR> 鈶?3鈫?BR> 4鈻?鈫?BR> 鈶?3錛坱ab閿級4鈫?BR> 5鈫?/P>
渚?.
#include "stdio.h"
int main(void)
{
int a,b,c;
scanf("%d,%d,%d",&a,&b,&c);
printf("%d,%d,%d\n",a,b,c);
return 0;
}
榪愯鏃舵寜濡備笅鏂瑰紡杈撳叆涓変釜鍊鹼細
3,4,5銆鈫欙紙杈撳叆a,b,c鐨勫鹼級
鎴栬?/P>
3,鈻?,鈻?銆鈫欙紙杈撳叆a,b,c鐨勫鹼級
3,鈻♀枴鈻?,鈻?銆鈫欙紙杈撳叆a,b,c鐨勫鹼級
......
閮芥槸鍚堟硶鐨勶紝浣嗘槸","涓瀹氳璺熷湪鏁板瓧鍚庨潰錛屽錛?BR>3鈻★紝4,鈻?銆鈫欏氨闈炴硶浜嗭紝紼嬪簭鍑洪敊銆傦紙瑙e喅鏂規(guī)硶涓庡師鍥犲悗闈㈣錛?/P>
鍐嶅錛?/P>
1銆乻acnf()涓殑鍙橀噺蹇呴』浣跨敤鍦板潃銆?/P>
銆銆 int a, b;
scanf("%d%d",a,b); //閿欒
scanf("%d%d",&a,&b);
2銆乻canf()鐨勬牸寮忔帶鍒朵覆鍙互浣跨敤鍏跺畠闈炵┖鐧藉瓧絎︼紝浣嗗湪杈撳叆鏃跺繀欏昏緭鍏ヨ繖浜涘瓧絎︺?/P>
渚嬶細
scanf("%d,%d",&a,&b);
杈撳叆錛?3錛? 鈫欙紙閫楀彿涓?%d,%d"涓殑閫楀彿瀵瑰簲錛?
scanf("a=%d,b=%d",&a,&b);
杈撳叆錛?a=3錛宐=4 鈫欙紙"a=","b=",閫楀彿涓?%d,%d"涓殑"a=","b="鍙婇楀彿瀵瑰簲錛?/P>
3銆佸湪鐢?%c"杈撳叆鏃訛紝絀烘牸鍜屸滆漿涔夊瓧絎︹濆潎浣滀負鏈夋晥瀛楃銆?/P>
渚嬶細
scanf("%c%c%c",&c1,&c2,&c3);
杈撳叆錛歛鈻鈻鈫?
緇撴灉錛歛鈫抍1錛屸枴鈫抍2錛宐鈫抍3 (鍏朵綑琚涪寮?
scanf()鍑芥暟鎺ユ敹杈撳叆鏁版嵁鏃訛紝閬囦互涓嬫儏鍐電粨鏉熶竴涓暟鎹殑杈撳叆錛氾紙涓嶆槸緇撴潫璇canf鍑芥暟錛宻canf鍑芥暟浠呭湪姣忎竴涓暟鎹煙鍧囨湁鏁版嵁錛屽茍鎸夊洖杞﹀悗緇撴潫錛夈?BR> 鈶?閬囩┖鏍箋佲滃洖杞︹濄佲滆煩鏍尖濋敭銆?BR> 鈶?閬囧搴︾粨鏉熴?BR> 鈶?閬囬潪娉曡緭鍏ャ?/P>
涓婄瘒灝卞啓鍒拌繖閲屽惂錛岀涓夊皬鑺傜殑渚嬬▼"鎶?鑷綉涓婄殑涓涓暀紼嬶紙鍘熷洜鏈変簩錛氫竴錛屽彲浠ュ皯鎵撲笉灝戝瓧銆備簩錛屸枴鈫欐垜涓嶇煡閬撴庝箞鎵撱俕_^)錛屽茍鍒犲幓鍏朵腑鐨勯敊璇箣澶?榪欓噷涔熼『渚挎彁閱掓湰鏂囪鑰呬竴鍙ワ細鍑′簨瑕佷翰鍔涜屼負錛屽嵆浣挎槸緇忓吀鐨勪功綾嶄篃涓嶅厤鏈夌枏婕忎箣澶勶紝鎵浠ワ紝鐢ㄧ紪璇戝櫒璇磋瘽鏄渶鍙潬鐨勶紝鏄鏄敊璇風紪璇戝櫒鍛婅瘔浣犮?/P>
瀵逛簬鏁扮粍錛屽洜涓虹郴緇熶細鎸夌収浣犳寚瀹氱殑澶у皬涓烘暟緇勫垎閰嶅瓨鍌ㄧ┖闂達紝榪欎篃鏄負浠涔堟暟緇勫繀欏繪寚瀹氬ぇ灝忕殑鍘熷洜錛屽錛歝har array[5] ; //緋葷粺浼氳嚜鍔ㄤ負鍏墮鐣檚izeof(char)*5涓瓧鑺傜殑榪炵畫鍐呭瓨錛堟敞鎰忔槸榪炵畫鐨勶級銆傛墍浠ユ垜浠彲浠ュarray[0]...array[4]榪欎簲涓彉閲忛殢渚胯闂紙璇誨拰鍐欙級閮戒笉浼氭湁闂銆?BR>瀵逛簬鎸囬拡錛岀郴緇熷彧浼氫負鎵瀹氫箟鐨勬寚閽堝彉閲忓垎閰嶇┖闂達紝鎸囬拡鎵鎸囧悜鐨勫湴鐐瑰茍鏈垎閰嶃備婦涓緥瀛愶細 char *p ; 榪欓噷浼氫負鍙橀噺p鍒嗛厤絀洪棿錛屽ぇ灝忎負4瀛楄妭錛?2浣嶆満錛夛紝浣嗘槸*p錛堝氨鏄痯鎸囧悜鐨勫湴鏂癸級鍗存槸闅忔満鐨勫湴鏂癸紝榪欎釜鍦版柟緋葷粺涔熶笉涓哄叾鍒嗛厤絀洪棿銆傛墍浠ュ湪榪欑鎯呭喌涓嬶紝浣犺闂拰緇檖璧嬪鹼紙p=...)閮芥槸鍏佽鐨勶紝浣嗘槸璁塊棶*p鎴栬呯粰*p璧嬪奸兘鏄敊璇殑銆傛垜浠鎯充嬌鐢?p蹇呴』鍏堜嬌鍏舵寚鍚戞湁鏁堝尯鍩燂紝榪欏彲浠ラ氳繃鍔ㄦ佺敵璇峰唴瀛樻垨鑰呰祴鍊鹼紙灝嗙煡閬撶殑鏈夋晥鍦扮偣璧嬬粰瀹冿級鏉ュ疄鐜般?BR>鎻愰啋涓涓嬶細瀵逛簬鎸囬拡錛屽湪浣跨敤鏃訛紝涓嶅厜鎵鎸囧悜鐨勫尯鍩熻兘璇誨啓錛屾寚閽堝彉閲忔湰韜篃鑳借鍐欙紝浣嗘槸鏁扮粍涓嶅悓錛屾暟緇勫悕鐨勪笉鑳藉啓鐨勶紙鍏佽璇伙級銆備負浠涔堬紵鍥犱負鎸囬拡鍙橀噺p鏈夊瓨鍌ㄧ┖闂達紝鑰屾暟緇勫悕array鏄病鏈夌殑銆?/P>
涓綰ф寚閽堬紝char *p ; //p涓烘寚鍚慶har綾誨瀷鐨勬寚閽堝彉閲忋?/P>
鏈変簡鎸囬拡鍙橀噺鎴戜滑灝卞彲浠ュ畾涔変換浣曠被鍨嬬殑鎸囬拡錛屽彲浠ラ殢蹇冩墍嬈茬殑鐢ㄦ寚閽堟潵璁塊棶浠諱綍綾誨瀷鐨勫彉閲忋備絾鏄湁浜哄彂鐜頒簡闂錛屼嬌鐢ㄨ繖縐嶅畾涔夛紝鎴戜滑鏃犳硶鐢ㄦ寚閽堟潵鎿嶇旱鎸囬拡綾誨瀷錛屼簬鏄簩綰ф寚閽堢殑瀹氫箟琚嬁鍑烘潵浜嗐?/P>
浜岀駭鎸囬拡灝辨槸鎸囧悜鎸囬拡鐨勬寚閽堬紝鐢ㄦ潵鎿嶇旱涓鎸囬拡鍙橀噺銆?BR>渚嬶細char **pp ;
瀹氫箟鐨刾p涓烘寚鍚戜竴涓?鎸囧悜涓char鍙橀噺鐨勬寚閽?鐨勬寚閽堛?BR>鎴戜滑鍙互灝?pp鎸囧悜鍒板墠闈㈠畾涔夌殑p : pp = &p ;
鐜板湪寰堝鏄撶湅娓呬粬浠箣闂翠釜鍏崇郴錛?BR>*pp灝辨槸璁塊棶pp鎸囧悜鐨勪綅緗紝璁塊棶鐨勫煎綋鐒跺氨鏄痯,
**pp灝辨槸*(*pp)鎷夛紝褰撶劧絳変簬*p.
娉ㄦ剰 瀹氫箟pp鐨勬椂鍊欙紝緋葷粺鍙負pp鍒嗛厤浜嗙┖闂達紝騫舵湭涓?pp鍒嗛厤絀洪棿錛屽悗鏉ヨ兘璁塊棶*pp鏄洜涓烘垜浠嬌鐢╬p=&p灝唒p鎸囧悜浜?amp;p榪欎釜宸茬粡鍒嗛厤濂戒簡鐨勭┖闂淬?/P>
鍚岀悊錛屼負浜嗘帶鍒朵簩綰ф寚閽堜簬鏄湁浜嗕笁綰ф寚閽堬紝...
char array[5];//瀹氫箟浜哸rray涓哄惈鏈?涓猚har鍏冪礌鐨勬暟緇勩?BR>浜岀淮鏁扮粍鐨勫畾涔夋垜灝變笉澶氳浜嗭紝鐩鎬俊澶у鐭ラ亾寰楀凡緇忓緢璇︾粏浜嗐傛垜榪欓噷灝辮涓璇翠粬浠殑鍚嶇О鍚с傛彁閱掍竴涓嬶細浠栨彁鍑虹殑鎰挎剰鏄垜浠笇鏈涘緱鍒癮rray綾誨瀷鐨勬暟緇勩?BR>char arrayMulti[3][5] ;
鍓嶉潰璇磋繃鏁扮粍鍚嶄笉鏄彉閲忥紝閭d箞瀹冩槸鎬庝箞浣跨敤鐨勫憿錛?BR>鍏跺疄鏁扮粍鍚嶅彧鏄湪緙栬瘧鏃跺埢緙栬瘧鍣ㄧ敤鏉ュ畾浣嶅彉閲忎綅緗殑涓涓爣絳俱傛瘮濡?array[3],閭d箞緙栬瘧鍣ㄥ氨璁や負鏄滄爣絳?3鈥濓紝浣犲鏋滃啓 array[6]錛岄偅涔堢紪璇戝櫒灝辮涓烘槸鈥滄爣絳?6鈥濓紝榪欏氨鏄疌涓嶄細緇欏嚭鏁扮粍瓚婄晫閿欒鐨勫師鍥犮傞偅涔坅rrayMulti鏄粈涔堝憿錛熺粏璇諱簩緇存暟緇勭殑瀹氫箟錛氭垜浠畾涔夌殑鏄竴涓暟緇勭殑鏁扮粍銆傛垜浠啓浜嗚繖涓畾涔夛紝灝辨剰鍛崇潃鎴戜滑宸茬粡鏈変簡 char [5] 榪欑綾誨瀷鐨勬暟緇勶紝鑰岀幇鍦ㄦ垜浠瀹氫箟涓涓幇鏈夋暟緇勭被鍨嬬殑鏁扮粍arrayMulti 銆傚茍涓斿湪浠ュ悗鐨勭▼搴忎腑浠栦細姘歌繙璁板緱瀹冪殑鍏冪礌鐨勭被鍨嬫槸char [5]錛屾墍浠ヤ綘鍦ㄨ闂粬鐨勫厓绱燼rrayMulti[1]鏃訛紝浠栫煡閬撹繖鏄竴涓猚har[5]鐨勬暟緇勩傚悓鏍蜂簩緇存暟緇勪篃涓嶆鏌ヨ秺鐣岋紝鎵浠ヤ綘鍐檃rrayMulti[2][5]涓嶄細鏈夐棶棰樸?BR>鎻愮ず錛氱紪璇戝櫒涓嶆鏌ユ暟緇勭殑瓚婄晫錛屼絾浼氭鏌ユ暟緇勫厓绱犵殑綾誨瀷錛屾墍浠ワ細
瀵逛簬array ,浣犵粰array[0]涓涓猧nt鍨嬬殑鍊兼槸涓嶈鐨勶紝鍥犱負浠栫殑鍏冪礌鏄痗har綾誨瀷錛?BR>瀵逛簬arrayMulti,浣犱粬鐨勫厓绱犱竴涓猚har[6]鐨勫間篃鏄笉琛岀殑錛堣緇嗕緥瀛愯鈥滆湑鍖栤濓級銆?/P>
鏁扮粍鍦ㄤ綔涓哄嚱鏁板弬鏁版椂錛屾暟緇勫悕灝嗚湑鍖栦負鎸囬拡銆侰璇█鐨勪功涓婃槸榪欎箞璇寸殑錛屾垜榪欓噷瑕佽寰楁槸錛氳繖鍙ヨ瘽鏄笉瀹屽叏姝g‘鐨勶紒鎴戜滑鐭ラ亾鎸囬拡鏄崰鐢ㄥ唴瀛樼殑錛屼絾鏄繖涓湑鍖栬屾垚鐨勫浼欐槸涓嶅崰鏈夊唴瀛樼殑錛屼粛鐒跺彧鏄釜鏍囩銆備功涓婁負浠涔堣繖涔堣鍛紵涔︿笂鐨勬剰鎬濇槸璇磋繖瀹朵紮宸茬粡铚曞寲寰椾笉鐭ラ亾鑷繁鏈夊嚑涓厓绱犱簡銆備婦涓緥瀛愶細
void fun(char array[5]);
鍦ㄧ紪璇戞椂緙栬瘧鍣ㄤ細褰撴垚鏄?void fun(char *array);浣犲湪榪欎釜鍑芥暟涓嬌鐢╯izeof(a)寰楀埌鐨勫兼槸4錛岃屽湪瀹氫箟char array[5]鐨勫嚱鏁頒腑sizeof(array) = 5,璇存槑紜疄宸茬粡铚曞寲涓烘寚閽堜簡銆傛墍浠ヤ綘鍐欙細
char *pa = array ; //姝g‘錛屾寚閽堝埌鎸囬拡
鏁扮粍鍚嶉鍖栦負鎸囬拡錛屽湪榪欓噷寮鴻皟涓涓嬶細鏁扮粍鐨勫厓绱犵被鍨嬩粛鐒跺瓨鍦紒榪欓噷瑕佹敞鎰忕殑鏄緇存暟緇勭殑鎯呭喌銆?BR>浠?緇存暟緇勪負渚嬶細
void fun2(char arrayMulti[3][5]);
閭d箞鍦ㄥ嚱鏁癴un2涓紝arrayMulti铚曞寲鎴愮殑鏄痗har (*)[5],鍗籌細鎸囧悜char[5]綾誨瀷鐨勬寚閽堬紝鍥犱負鍓嶉潰鍒嗘瀽榪嘺rrayMulti鐨勫厓绱犵殑綾誨瀷鏄痗har[5]錛屾墍浠ュ湪紼嬪簭涓細
char **pm = arrayMulti ; //閿欒錛氫粠char (*)[5]鍒?char **鐨勮祴鍊?BR>char (*pm5)[5] ;
pm5 = arrayMulti ; //姝g‘銆?
6.瀵瑰厓绱犵殑璁塊棶
鏁扮粍鍚嶆槸涓涓爣絳撅紝鏄竴涓褰曞湴鍧鐨勬爣絳撅紝鍦ㄥ鍏冪礌鐨勮闂笂鎵璧風殑浣滅敤鍜屾寚閽堜竴鏍鳳紝鎵浠ワ細
int a[5];
int *b;
b=a;
閭d箞錛?BR>a[1],b[1],*(a+1),*(b+1)閮芥槸鍏佽鐨勩?BR>鏇存?zhèn)竴鐐癸細鍥犱負鍏跺湪榪欏効鎵璧風殑浣滅敤浠呬粎鏄釜鏍囩鑰屽凡錛堢紪璇戠殑鏃跺欏氨鏄涓よ呯浉鍔狅級錛屾墍浠ワ細
1[a],1[b],涔熸槸鍏佽鐨勩?/P>
7.鍙栧湴鍧
瀵規(guī)寚閽堝彉閲忎嬌鐢?amp;榪愮畻鍚庡緱鍒扮殑鏄寚閽堝彉閲忕殑鍦板潃錛岄偅涔堟暟緇勫悕鍛紵
浠栦粎浠呮槸涓爣絳懼晩錛屾牴鏈氨娌″湴鏂瑰瓨鏀俱?BR>鎵浠璇█涓殑瑙勫畾鏄彇鏁扮粍鍦板潃鐨勭粨鏋滄槸錛氫粛鐒舵槸鍏舵湰韜?BR>鏃?&array 鐨勫煎拰 array涓鏍楓?BR>娉ㄦ剰錛氬兼槸涓鏍鳳紝綾誨瀷鏄笉涓鏍風殑銆?/P>
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铏界劧鏁扮粍鍚嶇殑紜病鏈夊瓨鍌ㄧ┖闂達紝浣嗘妸&a瑙勫畾涓鴻窡a鐨勫湴鍧鍊間竴鏍峰茍涓嶆槸榪欎釜鍘熷洜銆?BR>鏁扮粍鍚嶆槸涓涓彸鍊鹼紝鏈潵涓嶇鍚?amp;鐨勮娉曠殑錛屼絾鏄紝鏁扮粍鍗存槸涓涓璞★紝瀵逛竴涓?BR>鏁扮粍瀵硅薄鍙栧湴鍧鏄悎鐞嗙殑錛孋鏍囧噯濮斿憳浼氱粡榪囪 閲忥紝璁や負緇存姢涓涓璞$殑瀹屾暣鎬?BR>鏇撮噸瑕侊紝鍥犳鍏佽&a錛屽彧涓嶈繃錛?amp;a鐨勬剰涔夛紝騫墮潪瀵逛竴涓暟緇勫悕鍙栧湴鍧錛岃屾槸瀵?BR>涓涓暟緇勫璞″彇鍦板潃銆?/P>