CC++层序设计教程课后实验答案(第一章~第七章).docVIP

[免费!] C/C++层序设计教程 课后实验答案(第一章~第七章) 实验1.1 #include iostream.h #include iomanip.h void main() { int x; cinx; int y; y=x*x; coutx*x=hexyendl; } 实验1.2 #include iostream.h void main() { float x=1,y=2,h=3,s; s=h*(x+y)/2.0; cout上底为1，下底为2，高为3的梯形面积为：sendl; } 实验1.3 #include iostream.h void main() { float x,y,z,s; cout请输入三门成绩x,y,z：endl; cinxyz; s=(x+y+z)/3; cout三门课平均成绩为：sendl; } 实验2.1 #include iostream.h #include iomanip.h void main() { float s1,s2,s3; double aver; cout输入三个数据：endl; cins1s2s3; aver=(s1+s2+s3)/3; aver=aver*100+0.5; aver=(int)aver; aver=aver/100; cout平均值=averendl; } 实验2.2 #include iostream.h #include math.h void main() { double x,y,z; cout请输入直角三角形的两直角边长：endl; cinxy; z=sqrt(x*x+y*y); cout该直角三角形的斜边长为：zendl; } 实验2.4 #include iostream.h void main() { double a,b,c,t,ave; cout请输入三个数endl; cinabc; if (ab) t=a; else t=b; if (tc) t=t; else t=c; ave=(a+b+c)/3; cout三个数的平均值为ave，其中最小的数为：tendl; } 实验2.3 #include iostream.h void main() { double x,y,r,t; cout请输入x yendl; cinxy; r=x*x+y*y; if (r=16 r=4) t=12*3.1415926; else t=0; couttendl; } 实验2.5 #include iostream.h void main() { char c1=f,c2=l,c3=y; coutc1c2c3endl; c1=c1+3; c2=c2+3; c3=c3+3; if(c1z) c1=c1-26; if(c2z) c2=c2-26; if(c3z) c3=c3-26; coutc1c2c3endl; } 实验3.1 #include iostream.h void main() { int x,y; float r1,r2; cinxy; if(x==0||y==0) coutinput errorendl; else { if(xy) { r1=x/y; r2=x%y; } else { r1=y/x; r2=y%x; } cout商= r1 余数= r2endl; } } 实验3.2 #include iostream.h void main() { int x,y; cout请输入上网时间x:endl; cinx; if(x=65) y=130; else if(x=50) y=x*2; else if(x=10) y=x*2.5; else y=30; cout上网费用y为：yendl; } 实验3.3 #include iostream.h void main() { float x,y1,y2; int xp; coutendl; cinx; if(x=3000) y1=0.7*x; else if(x=2000) y1=0.8*x; else if(x=1000) y1=0.9*x; else y1=x; xp=(int)x/1000