实验一MATLAB 运算基础.doc

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1、实验一MATLAB运算基础二、1(3)fora=-0.3:0.1:3.0z3=((exp(0.3*a)-exp(-0.3*a)))/2*sin(a+0.3)+log((0.3+a)/2);disp(,z3=,);disp(z3);end结果是：z3=-Inf,-3.0017,-2.3085,-1.8971,-1.5978,-1.3575,-1.1531,-0.9723,-0.8083,-0.6567,-0.5151,-0.3819,-0.2561,-0.1374,-0.0255,0.0792,0.17

2、66,0.2663,0.3478,0.4206,0.4841,0.5379,0.5815,0.6145,0.6366,0.6474,0.6470,0.6351,0.6119,0.5777,0.5327,0.4774,0.4126,0.3388二、1(4)fort=0:0.5:2.5;ifO<=t&[vlz4=t*t;disp('z4=t*t=');disp(z4);endifl<=t&t<2z4=t*t-l;disp(,z4=t*t-l=,);disp(z4);endif2<=t&t<3z4=t*t-

3、2*t+l;disp('z4=t*t-2*t+1=');disp(z4);endend结果：z4=t*t=0z4=t*t=0.2500z4=t*t-l=0z4=t*t-1=1.2500z4=t*t-2*t+1=1z4=t*t-2*t+1=2.2500二、4(1)data=0;fort=100:999ifrem(t,21)==0;data=data+l;endenddisp('100到999之间能被21整除的数的个数是：*)disp(data);结果：100到999之间能被21整除的数的个数是：43二、

4、4(2)ch=EOJIOD32jdskf#DIEsjdfie‘k=find(ch<=,Z&ch>二'A')ch(k)=[];disp(ch);结果：k=l2345615161732jdsk併sjdfie实验三选择结构程序设计2.用if语句实现：x=input(*输入学生成绩)；ifx>100lx<0dispC请输入止确的成绩匕endifx>=90&x<=100;disp(A);endifx>=80&x<=89;disp('B');endifx>=70&x<=79;disp('C);endifx>=60

5、&x<=69;disp(D);endifx<60;disp(E);end用switch语句实现：x=input「输入学生成绩’)；switchfix(x/10)case10disp('A');case9disp('A');case8disp(';case7disp(‘C，);case6disp('D‘);case5disp(‘E‘)；case4disp('E‘);case3disp(?E?);case2disp(‘E，);卜ase1disp('E‘);case0dispCE?);otherwisedi

6、spC成绩输入错误’);endwhile1datal=fix(rand*100);data2=fix(rand*100);ifdatal>=10&data2>=10break;endendfh=input(输入一个运尊符/s')iffh='+‘data=datal+data2;endiffh=='-'data=datal-data2;endiffh='data=datal*data2;endiffh=='/,data=datal/data2;enddisp([dataljdata2]);disp(da

7、ta)4data二input('输入一个四位数：');ge=rem(data,l0)+7;shi=rem(fix(data/10),10)+7;bai=rem(fix(data/100),10)+7;qian=fix(data/1000)+7;dataout=shi*l000+ge*100+qian*10+bai;disp(dataout)ge=rem(dataout,10);shi=rem(fix(dataout/10),10);bai=rem(fix(dataout/100),10);qian=f

8、ix(dataout/1000);ge=rem(ge-7+10,10);shi=rem(shi-7+10,10);bai=rem(bai-7+10,10);qian=fix(qian-7+10,10);