如何在C#或者java编程中像matlab中的syms那样定义符号常量
matlab\u6211\u60f3\u5b9a\u4e49\u4e00\u4e2a\u7b26\u53f7\u53d8\u91cfa\uff0csyms a; \u8be5\u7b26\u53f7\u53d8\u91cf\u5fc5\u987b\u662f\u4e00\u4e2a\u5b9e\u6570\uff0c\u8bf7\u95ee\u4ee3\u7801\u5e94\u8be5\u5982\u4f55\u5199\uff1fmatlab\u4e2d\u9ed8\u8ba4\u7684\u662f\u590d\u6570\uff0c\u6240\u4ee5\u4f60\u5e94\u8be5\u8fd9\u6837\u5199syms a real \u5c31\u80fd\u628aa\u5b9a\u4e49\u4e3a\u5b9e\u6570\u4e86\u3002
\u5728\u5f00\u53d1\u73af\u5883\u4e2d\uff0c\u4f7f\u7528\u6237\u66f4\u65b9\u4fbf\u5730\u63a7\u5236\u591a\u4e2a\u6587\u4ef6\u548c\u56fe\u5f62\u7a97\u53e3\uff1b\u5728\u7f16\u7a0b\u65b9\u9762\u652f\u6301\u4e86\u51fd\u6570\u5d4c\u5957\uff0c\u6709\u6761\u4ef6\u4e2d\u65ad\u7b49\uff1b\u5728\u56fe\u5f62\u5316\u65b9\u9762\uff0c\u6709\u4e86\u66f4\u5f3a\u5927\u7684\u56fe\u5f62\u6807\u6ce8\u548c\u5904\u7406\u529f\u80fd\uff0c\u5305\u62ec\u5bf9\u6027\u5bf9\u8d77\u8fde\u63a5\u6ce8\u91ca\u7b49\uff1b\u5728\u8f93\u5165\u8f93\u51fa\u65b9\u9762\uff0c\u53ef\u4ee5\u76f4\u63a5\u5411Excel\u548cHDF5\u8fdb\u884c\u8fde\u63a5\u3002
\u6269\u5c55\u8d44\u6599\uff1a
\u652f\u6301\uff1aSimulink \u4ea7\u54c1\u7cfb\u5217\u91cd\u8981\u529f\u80fd\u3002
1\u3001Simulink®: Simulation Performance Advisor\uff0c\u94fe\u63a5\u5e93\u6a21\u5757\u7684\u5c01\u88c5\uff0c\u4ee5\u53ca\u901a\u8fc7\u903b\u8f91\u8868\u8fbe\u5f0f\u63a7\u5236\u6709\u6548\u53d8\u91cf\u3002
2\u3001Simulink: \u9664 LEGO® MINDSTORMS® NXT\u3001Arduino®\u3001Pandaboard \u548c Beagleboard \u5916\uff0c\u8fd8\u4e3a Raspberry Pi™ \u548c Gumstix® Overo® \u786c\u4ef6\u63d0\u4f9b\u4e86\u5185\u7f6e\u652f\u6301\u3002
3\u3001SimRF™: \u9488\u5bf9\u5feb\u901f\u4eff\u771f\u548c\u6a21\u578b\u52a0\u8f7d\u65f6\u95f4\u7684\u7535\u8def\u5305\u7edc\u6c42\u89e3\u5668\u3002
4\u3001SimMechanics™: \u53d1\u5e03\u4e86\u7528\u4e8e\u4ece CAD \u548c\u5176\u4ed6\u7cfb\u7edf\u5bfc\u5165\u6a21\u578b\u7684 XML \u67b6\u6784\u3002
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-MATLAB
matlab\u4e2dsyms\u610f\u601d\u662f\u5b9a\u4e49\u591a\u4e2a\u53d8\u91cf\u3002
syms\u7684\u529f\u80fd\u548csym\u51fd\u6570\u76f8\u540c\uff0c\u4f46syms\u53ef\u4ee5\u540c\u65f6\u521b\u5efa\u591a\u4e2a\u7b26\u53f7\u5bf9\u8c61\uff0c\u56e0\u6b64\u5728\u521b\u5efa\u591a\u4e2a\u7b26\u53f7\u53d8\u91cf\u65f6\u8bed\u6cd5\u4e0a\u8981\u6bd4\u4f7f\u7528sym\u7b80\u5355\u3002
1\u3001\u521b\u5efa\u7b26\u53f7\u53d8\u91cfx\u548cy\uff1b
\u4f8b\u5982\uff1asyms x y
2\u3001\u5217\u51fa\u6240\u6709\u7b26\u53f7\u53d8\u91cf\u3001\u51fd\u6570\u548c\u6570\u7ec4
\u521b\u5efa\u4e00\u4e9b\u7b26\u53f7\u53d8\u91cf\u3001\u51fd\u6570\u548c\u6570\u7ec4\u5982\uff1asyms a f(x)\uff1bA = sym('A',[2 3])\uff1b
\u6269\u5c55\u8d44\u6599sym\u8bed\u6cd5\u683c\u5f0f\uff1a
S = sym(A)\u5c06\u975e\u7b26\u53f7\u5bf9\u8c61\uff08\u5982\uff0c\u6570\u5b57\uff0c\u8868\u8fbe\u5f0f\uff0c\u53d8\u91cf\u7b49\uff09A\u8f6c\u6362\u4e3a\u7b26\u53f7\u5bf9\u8c61\uff0c\u5e76\u5b58\u50a8\u5728\u7b26\u53f7\u53d8\u91cfS\u4e2d\u3002
x = sym('x')
\u521b\u5efa\u7b26\u53f7\u53d8\u91cfx\uff0c\u5176\u540d\u5b57\u662f'x'\u3002\u793a\u4f8b\uff1aalpha = sym('alpha')
x = sym('x', 'real')
\u8fd9\u91cc\u5047\u8bbex\u662f\u5b9e\u6570\uff0c\u56e0\u6b64\u6709x\u7684\u5171\u8f6dconj(x)\u7b49\u4e8ex\u3002\u793a\u4f8b\uff1ar = sym('Rho','real')
k = sym('k', 'positive')
\u8fd9\u91cc\u521b\u5efa\u4e00\u4e2a\u6b63\u7684\uff08\u5b9e\u6570\uff09\u7b26\u53f7\u53d8\u91cf\u3002
x = sym('x', 'clear')
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1\u2014syms
必须要定义，定义之后才可以使用。如下面的例子，未定义就会出错。
符号变量定义方法例如: sym x 或者 syms x ，两者有区别也有共同点。
情况二：计算过程当中的存储数值的变量
可以不必定义，随时需要，随时定义，但是有时候如果变量很多，那么最好提前声明，声明的时候，可以直接赋予0值，并且注释，这样方便以后区分，避免混淆。
绛旓細Repl.it CodeChef Jdoodle 浣跨敤鍦ㄧ嚎缂栫▼鐜鐨勬楠ら氬父鏄:鍦ㄧ綉绔欎笂娉ㄥ唽涓涓笎鎴枫傚垱寤轰竴涓柊鐨 "椤圭洰"銆傞夋嫨 C 璇█浣滀负鎮ㄧ殑椤圭洰鐨勭紪绋嬭瑷銆傚湪缂栬緫鍣ㄤ腑缂栧啓鎮ㄧ殑 C 浠ｇ爜銆備娇鐢ㄧ綉绔欐彁渚涚殑缂栬瘧鍣ㄧ紪璇戜唬鐮併傝繍琛屾偍鐨勭▼搴忓苟鏌ョ湅杈撳嚭銆傛偍涔熷彲浠ヤ娇鐢ㄨВ閲婂櫒鏉ヨ繍琛 C 浠ｇ爜銆備緥濡傦紝鎮ㄥ彲浠ヤ娇鐢 CINT 瑙ｉ噴鍣ㄥ皢 C...
绛旓細1銆佺洿鎺ヨ皟鐢ㄧ郴缁熷嚱鏁 system("pause")锛歴ystem()浼氳皟鐢╢ork()浜х敓瀛愯繘绋, 鐢卞瓙杩涚▼鏉ヨ皟鐢/bin/sh-c string 鏉ユ墽琛屽弬鏁皊tring 瀛楃涓叉墍浠ｈ〃鐨勫懡浠, 姝ゅ懡浠ゆ墽琛屽畬鍚庨殢鍗宠繑鍥炲師璋冪敤鐨勮繘绋嬨俿ystem("pause")鍙互瀹炵幇鍐荤粨灞忓箷锛屼究浜庤瀵熺▼搴忕殑鎵ц缁撴灉銆傚涓嬶細2銆佽皟鐢╣etch()鍑芥暟锛氭鍑芥暟鏄竴涓笉鍥炴樉鍑芥暟...
绛旓細绌烘牸鍙互鐩存帴杈撳叆锛屼緥濡係ystem.out.println(" ");鑰屽鏋滅敤String琛ㄧず閭ｄ簺绗﹀彿鐨勮瘽锛岀┖鏍肩洿鎺ュ氨鏄痋t灏辫銆俓\ 鍙嶆枩鏉燶' 鍗曞紩鍙'\" 鍙屽紩鍙"\uxxxx 浠ュ崄鍏繘鍒舵寚瀹歎nicode瀛楃杈 \dxxx 浠ュ叓杩涘埗鎸囧畾Unicode瀛楃杈撳嚭 \b 鍊掗涓涓瓧绗 \f 鎹㈤〉 \n 鎹㈣ \r 鍏夋爣绉昏嚦琛岄 \t 璺虫牸锛堜竴涓猅AB閿級...
绛旓細鑾峰緱鏃ユ湡鍜屾椂闂 杩欓噷璇寸殑鏃ユ湡鍜屾椂闂村氨鏄垜浠钩鏃舵墍璇寸殑骞淬佹湀銆佹棩銆佹椂銆佸垎銆佺绛変俊鎭備粠绗2鑺傛垜浠凡缁忕煡閬撹繖浜涗俊鎭兘淇濆瓨鍦ㄤ竴涓悕涓簍m鐨勭粨鏋勪綋涓紝閭ｄ箞濡備綍灏嗕竴涓棩鍘嗘椂闂翠繚瀛樹负涓涓猼m缁撴瀯鐨勫璞″憿锛熷叾涓彲浠ヤ娇鐢ㄧ殑鍑芥暟鏄痝mtime()鍜宭ocaltime()锛岃繖涓や釜鍑芥暟鐨勫師鍨嬩负锛歴truct tm gmtime(const time_...
绛旓細鍒╃敤C璇█鍦ㄤ竴鎵规暟涓壘鏈澶ф暟鐨勪竴鑸柟娉曞涓嬶細锛1锛夊皢鏁版嵁瀛樺叆涓涓竴缁存暟缁勪腑锛屼緥濡傚瓨鍏鏁扮粍涓傦紙2锛夊湪鏁扮粍涓壘鏈澶у硷紙鍋囪鐢ㄥ彉閲弇ax瀛樻斁鏈澶у硷級銆傞鍏堝皢a[0]瑙嗕负鏈澶ф暟锛屽嵆棣栧厛浣縨ax=a[0]銆傚皢闄[0]涔嬪鐨勫叾浠栨墍鏈夊厓绱狅紙鐢╝[i]琛ㄧず锛夐愪釜涓巑ax姣旇緝锛岃嫢a[i]>max,鍒檃[i]涓虹洰鍓嶇殑...
绛旓細鐢ㄤ竴涓壒瀹氱殑鏁板瓧琛ㄧず缁撴潫锛屾瘮濡0锛 褰撶敤鎴疯緭鍏0 鐨勬椂鍊欏氨鍋滄锛屽彲浠ュ弬鑰冧笅闈㈢殑浠ｇ爜锛歩nt a[100],i, count;i =0;while(scanf("%d", &a[i]) != EOF) { if (a[i] == 0) break; // 鐢ㄦ埛杈撳叆浜0锛岃〃绀虹粨鏉熴俰++;} count = i-1;...
绛旓細// 澹版槑鍛藉悕绌洪棿锛岄潪蹇呴』int _tmain(int argc, _TCHAR* argv[]){ printf("hello world"); ClassLibrary1::Class1 ^c = gcnew ClassLibrary1::Class1(); //娉ㄦ剰涓瀹氳鐢 ^ , 涓瀹氳鐢╣cnew c->Name = "\nxignxianghong"; printf("%s\n", c->Name); c->helloW...
绛旓細鍙鍦ㄦ牸寮忔帶鍒剁閲岃緭鍏2涓 %% 灏卞彲浠ヤ簡锛屼緥濡傦細include <stdio.h> int main(){ int a=90;printf("%d%%\n",a);return 0;} 杩欐牱灏变細鍦ㄥ睆骞曚笂寰楀埌 90
绛旓細.浠ヤ笅鏍囧紩鐢ㄧ殑鏂瑰紡璁块棶鏁扮粍 鍦ㄤ娇鐢ㄦ暟缁勭殑鍦哄悎涓紝鎴戜滑甯歌鐨勪竴绉嶈闂柟娉曟槸浣跨敤涓嬫爣璁块棶鏁扮粍鍏冪礌锛屽锛歛rray[2] = 1,姝よ鍙ユ槸灏嗚鏁扮粍鐨勭涓変釜鍏冪礌璧嬪间负1.[ ]绗﹀彿涓殑鏁板瓧鍙互璁や负鏄湪鏁扮粍鍩哄湴鍧涓婄殑鍋忕Щ閲忥紝鍙互閫氳繃鏀瑰彉杩欎釜鍋忕Щ閲忔潵璁块棶鏁翠釜鏁扮粍銆2.浠ユ寚閽堣闂殑鏂瑰紡璁块棶鏁扮粍 闄や簡浣跨敤鍋忕Щ閲忕殑鏂规硶...
绛旓細閭ｄ箞,灏辨槸璇村彲浠ュ埄鐢╲oid *. void *鎰忔寚鏈寚瀹氱被鍨嬶紝涔熷彲浠ョ悊瑙ｄ负浠绘剰绫诲瀷銆傚叾浠栫被鍨嬬殑鎸囬拡鍙互鐩存帴璧嬪肩粰void *鍙橀噺锛屼絾鏄痸oid *鍙橀噺闇瑕佸己鍒剁被鍨嬭浆鎹负鍏跺畠鎸囬拡绫诲瀷銆傝繖涓浉淇″ぇ瀹堕兘鐭ラ亾銆傞偅涔堜笅闈互涓涓畝鍗曠殑棰樼洰涓轰緥锛屾潵鎺㈣濡備綍鍦–璇█涓疄鐜版ā鏉垮嚱鏁般 鏂规硶1锛氬埄鐢╲oid *. 鍦ㄧ湅涓嬮潰鐨勬簮绋...
