用MATLAB或MAPLE编程找出n以内符合条件的自然数a,b,c和d，使满足：ab=2(c+d), cd=2(a+b) matlab阶乘怎么表示
matlab nargin \u7528\u6cd5\u793a\u4f8b\uff1a
1. \u5f53\u524d\u51fd\u6570\u7684\u8f93\u5165
\u5728\u540d\u4e3a addme.m \u7684\u6587\u4ef6\u4e2d\u521b\u5efa\u6700\u591a\u53ef\u63a5\u53d7\u4e24\u4e2a\u8f93\u5165\u7684\u51fd\u6570\u3002\u5728\u51fd\u6570\u4e3b\u4f53\u4e2d\u4f7f\u7528 nargin \u786e\u5b9a\u8f93\u5165\u6570\u76ee\u3002
type addme.mfunction c = addme(a,b)switch nargincase 2c = a + b;case 1c = a + a;otherwisec = 0;endend
\u5728\u547d\u4ee4\u63d0\u793a\u7b26\u4e0b\u4f7f\u7528\u4e24\u4e2a\u8f93\u5165\u8c03\u7528 addme \u51fd\u6570\u3002c = addme(13,42)c = 55
\u4f7f\u7528\u4e00\u4e2a\u8f93\u5165\u8c03\u7528\u8be5\u51fd\u6570\u3002c = addme(13)c = 26
2. \u4e3a\u51fd\u6570\u5b9a\u4e49\u7684\u8f93\u5165
\u786e\u5b9a\u4e00\u4e2a\u51fd\u6570\u53ef\u63a5\u53d7\u591a\u5c11\u4e2a\u8f93\u5165\u3002
\u4e0a\u4e00\u4e2a\u793a\u4f8b\u4e2d\u521b\u5efa\u7684 addme \u51fd\u6570\u5728\u58f0\u660e\u8bed\u53e5\u4e2d\u5305\u542b\u4e24\u4e2a\u8f93\u5165\uff08a \u548c b\uff09\u3002\u4ee5\u5b57\u7b26\u5411\u91cf\u7684\u5f62\u5f0f\u5b9a\u4e49\u51fd\u6570\u540d\u79f0\uff0c\u5e76\u4f7f\u7528\u5b83\u4f5c\u4e3a nargin \u7684\u8f93\u5165\u3002
fun = 'addme';nargin(fun)ans = 2
3. \u4f7f\u7528 varargin \u7684\u51fd\u6570\u7684\u8f93\u5165
\u786e\u5b9a\u4f7f\u7528 varargin \u7684\u51fd\u6570\u53ef\u63a5\u53d7\u591a\u5c11\u4e2a\u8f93\u5165\u3002
\u5728\u540d\u4e3a mynewplot.m \u7684\u6587\u4ef6\u4e2d\u521b\u5efa\u4e00\u4e2a\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u63a5\u53d7\u6570\u503c\u8f93\u5165 x \u548c y\uff0c\u5e76\u4f7f\u7528varargin\u8fd4\u56de\u4efb\u610f\u6570\u76ee\u7684\u5176\u4ed6\u7ed8\u56fe\u8f93\u5165\u3002
type mynewplot.mfunction mynewplot(x,y,varargin)figureplot(x,y,varargin{:})title('My New Plot')end\u67e5\u8be2 newplot \u53ef\u4ee5\u63a5\u53d7\u591a\u5c11\u4e2a\u8f93\u5165\u3002
fx = 'mynewplot';nargin(fx)ans = -3\u8d1f\u53f7\u8868\u793a\u7b2c\u4e09\u4e2a\u8f93\u5165\u662f varargin\u3002mynewplot \u51fd\u6570\u53ef\u63a5\u53d7\u4e0d\u5b9a\u6570\u76ee\u7684\u9644\u52a0\u8f93\u5165\u53c2\u6570\u3002
\u6269\u5c55\u8d44\u6599\uff1a
nargin\u2014\u2014\u51fd\u6570\u8f93\u5165\u53c2\u6570\u6570\u76ee\u3002
2. \u8bed\u6cd5\uff1anargin\u6216nargin(fun)
3. \u8bf4\u660e\uff1a
nargin \u9488\u5bf9\u5f53\u524d\u6b63\u5728\u6267\u884c\u7684\u51fd\u6570\uff0c\u8fd4\u56de\u51fd\u6570\u8c03\u7528\u4e2d\u7ed9\u5b9a\u51fd\u6570\u8f93\u5165\u53c2\u6570\u7684\u6570\u76ee\u3002\u8be5\u8bed\u6cd5\u4ec5\u53ef\u5728\u51fd\u6570\u4f53\u5185\u4f7f\u7528\u3002
nargin(fun) \u8fd4\u56de fun \u51fd\u6570\u5b9a\u4e49\u4e2d\u51fa\u73b0\u7684\u8f93\u5165\u53c2\u6570\u7684\u6570\u76ee\u3002
\u5982\u679c\u8be5\u51fd\u6570\u5b9a\u4e49\u4e2d\u5305\u542b varargin\uff0c\u90a3\u4e48 nargin \u8fd4\u56de\u8f93\u5165\u6570\u76ee\u7684\u8d1f\u6570\u3002
\u4f8b\u5982\uff0c\u5982\u679c myFun \u51fd\u6570\u58f0\u660e\u8f93\u5165 a\u3001b \u548c varargin\uff0c\u90a3\u4e48 nargin('myFun') \u8fd4\u56de -3\u3002
4. \u8f93\u5165\u53c2\u6570
fun - \u51fd\u6570
nargin \u4ece\u8be5\u51fd\u6570\u7684\u5b9a\u4e49\u4e2d\u8fd4\u56de\u5176\u8f93\u5165\u53c2\u6570\u6570\u76ee\uff1b\u6307\u5b9a\u4e3a\u51fd\u6570\u53e5\u67c4\u3001\u5b57\u7b26\u5411\u91cf\u6216\u5b57\u7b26\u4e32\u6807\u91cf\u3002
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1aMathWorks \u4e2d\u56fd\u2014\u51fd\u6570\u8f93\u5165\u53c2\u6570\u6570\u76ee
matlab\u4e2d\u7684\u9636\u4e58\u51fd\u6570\u662ffactorial\uff0c\u5176\u51fd\u6570\u5f62\u5f0f\u4e3a\uff1afactorial(N) \u3002
1\u3001\u5f53N\u4e3a\u5411\u91cf\u65f6\uff0c\u8ba1\u7b97\u4ece1\u5230N\u8fd9N\u4e2a\u6570\u7684\u4e58\u79ef\uff0c\u5373\u76f8\u5f53\u4e8eprod(1:N)\u3002
2\u3001\u5f53N\u662fN\u7ef4\u6570\u7ec4\u65f6\uff0c\u8ba1\u7b97N\u4e2d\u6bcf\u4e2a\u5143\u7d20\u7684\u9636\u4e58\u3002
\u6ce8\u610f\uff1a\u7531\u4e8e\u5728matlab\u4e2d\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570\u7684\u6574\u6570\u4f4d\u6570\u5927\u7ea6\u662f15\u4f4d\uff0c\u53ea\u6709\u5bf9\u4e0d\u5927\u4e8e21\u7684\u6574\u6570\u8ba1\u7b97\u7ed3\u679c\u662f\u7cbe\u786e\u7684\uff0c\u5bf9\u5927\u4e8e21\u7684\u6574\u6570\uff0cfactorial\u7684\u8ba1\u7b97\u7ed3\u679c\u53ea\u6709\u524d15\u4f4d\u662f\u51c6\u786e\u7684\u3002
\u62d3\u5c55\u8d44\u65991\u3001Matlab\u662f\u4e00\u4e2a\u9ad8\u7ea7\u7684\u77e9\u9635/\u9635\u5217\u8bed\u8a00\uff0c\u5b83\u5305\u542b\u63a7\u5236\u8bed\u53e5\u3001\u51fd\u6570\u3001\u6570\u636e\u7ed3\u6784\u3001\u8f93\u5165\u548c\u8f93\u51fa\u548c\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7279\u70b9\u3002\u7528\u6237\u53ef\u4ee5\u5728\u547d\u4ee4\u7a97\u53e3\u4e2d\u5c06\u8f93\u5165\u8bed\u53e5\u4e0e\u6267\u884c\u547d\u4ee4\u540c\u6b65\uff0c\u4e5f\u53ef\u4ee5\u5148\u7f16\u5199\u597d\u4e00\u4e2a\u8f83\u5927\u7684\u590d\u6742\u7684\u5e94\u7528\u7a0b\u5e8f\uff08M\u6587\u4ef6\uff09\u540e\u518d\u4e00\u8d77\u8fd0\u884c\u3002
2\u3001\u65b0\u7248\u672c\u7684MATLAB\u8bed\u8a00\u662f\u57fa\u4e8e\u6700\u4e3a\u6d41\u884c\u7684C++\u8bed\u8a00\u57fa\u7840\u4e0a\u7684\uff0c\u56e0\u6b64\u8bed\u6cd5\u7279\u5f81\u4e0eC++\u8bed\u8a00\u6781\u4e3a\u76f8\u4f3c\uff0c\u800c\u4e14\u66f4\u52a0\u7b80\u5355\uff0c\u66f4\u52a0\u7b26\u5408\u79d1\u6280\u4eba\u5458\u5bf9\u6570\u5b66\u8868\u8fbe\u5f0f\u7684\u4e66\u5199\u683c\u5f0f\u3002
3\u3001\u4f7f\u4e4b\u66f4\u5229\u4e8e\u975e\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u79d1\u6280\u4eba\u5458\u4f7f\u7528\u3002\u800c\u4e14\u8fd9\u79cd\u8bed\u8a00\u53ef\u79fb\u690d\u6027\u597d\u3001\u53ef\u62d3\u5c55\u6027\u6781\u5f3a\uff0c\u8fd9\u4e5f\u662fMATLAB\u80fd\u591f\u6df1\u5165\u5230\u79d1\u5b66\u7814\u7a76\u53ca\u5de5\u7a0b\u8ba1\u7b97\u5404\u4e2a\u9886\u57df\u7684\u91cd\u8981\u539f\u56e0\u3002
N=input('input N=')
for a=0:1:N
for b=0:1:N
for c=0:1:N
for d=0:1:N
if(a*b==2*(c+d)&c*d==2*(a+b))
[a,b,c,d]
end
end
end
end
end
x=[];
for a=1:100
for b=1:100
for c=1:100
for d=1:100
if ((a*b)==(2*(c+d))&&(c*d)==(2*(a+b)))
x=[a b c d];
end
end
end
end
end
x
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