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华中科技大学C++上机实验答案(全)

2017-10-16 50页 doc 123KB 131阅读

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华中科技大学C++上机实验答案(全)华中科技大学C++上机实验答案(全) 实验一 /*要求从键盘输入三个不等的整数后按ENTER键,在屏幕上由大到小的输出。*/ #include using namespace std; int main(){ int a,b,c,max,min; cout>a>>b>>c; if(a>b){ max=a; min=b; } else{ max=b; min=a; } if(c>max) cout using namespace std; int main(){ int a,b,temp; co...
华中科技大学C++上机实验答案(全)
华中科技大学C++上机实验(全) 实验一 /*要求从键盘输入三个不等的整数后按ENTER键,在屏幕上由大到小的输出。*/ #include using namespace std; int main(){ int a,b,c,max,min; cout<<"请输入三个不同的整数:"<>a>>b>>c; if(a>b){ max=a; min=b; } else{ max=b; min=a; } if(c>max) cout< using namespace std; int main(){ int a,b,temp; cout<<"输入a,b:"; cin>>a>>b; cout<<"a="< using namespace std; int main(){ cout<<"sizeof(char)="< using namespace std; int main(){ cout<<"char"<<'\t'<
输出 #include using namespace std; int main(){ char datatype[]="char\tshort\tint\tlong\tfloat\tdouble"; cout< using namespace std; int main(){ const double PI=3.14; double r,s,v,m; cout<<"输入球的半径r(单位dm):"<>r; cout<<"r="<>a[0]>> a[1]>> a[2]>> a[3]>> a[4]>> a[5]>> a[6]>> a[7]>> a[8]>> a[9]; a[10]='\0'; cout<<"保存的数组a是:"< using namespace std; int main(){ int input; cout<<"Which number do you want to text:\n"; cin>>input; if(input%2==0) cout<<"The number"<0,输出两个不等的实根; 若?=0,输出两个相等实根;若?<0,输出两个复数根。*/ #include #include using namespace std; int main(){ float a,b,c,x1,x2,delta; cout<<"请输入一元二次方程的三个系数:"<>a>>b>>c; cout<<"a="<0){ cout<<"方程有两个不同的实根:"< using namespace std; int main(){ float score; cout<<"输入分数(0--100):"; cin>>score; if(score>=90)cout<<"A grade"<=80)cout<<"B grade"<=70)cout<<"C grade"<=60)cout<<"D grade"< using namespace std; int main(){ int score,n; cout<<"输入分数(0--100):"; cin>>score; n=score/10; switch(n){ case 10: case 9:cout<<"A grade"< using namespace std; int main(){ int a; cout<<"输入要测试的整数:"; cin>>a; if(a%3==0&&a%7!=0)cout< using namespace std; int main(){ int i; float f; cout<<"请输入月收入i:"; cin>>i; if(i<1200) cout<<"不用征收个人所得税"; else if (i<1700){ f=(i-1200)*0.05; cout<<"个人所得税为:"< using namespace std; int main(){ int n,i,result; cout<<"请输入n:"; cin>>n; if(n<1){ cout<<"输入错误~"<'z')cout<<"输入错误~"< using namespace std; int main() { int m[12]={31,28,31,30,31,30,31,31,30,31,30,31}; int year,mouth,day,ip=0,all,i; cout<<"请输入年、月、日:"<>year>>mouth>>day; if(year%4==0&&year%100!=0||year%400==0) m[1]=29; for(i=0;i using namespace std; int main(){ int i,j,k,m,n,count=0; for(i=1;i<=4;i++){ for(j=0;j<=4;j++){ if(j==i)continue; for(k=0;k<=4;k++){ if(k==j||k==3||k==i)continue; for(m=0;m<=4;m++){ if(m==k||m==3||m==i||m==j)continue; for(n=0;n<=4;n++){ if(n==m||n==k||n==j||n==i)continue; cout< using namespace std; int main(){ int a,n,i,sum=0,sum1=0; cout<<"请输入a和n的值:"<>a>>n; cout<<"a="<9||n<0)cout<<"输入错误~"< using namespace std; int main(){ int x=100,m,n,k; int count=0; do{ m=x%10; n=x/100; k=(x-n*100-m)/10; if(m*m*m+n*n*n+k*k*k==x){ cout< using namespace std; int main(){ char x[]={'A','B','C','D','E'}; char y[]={'J','K','L','M','N'}; int i=0; int j,k,l,m,n; for(j=0;j<=4;j++){ if(j==0)continue; for(k=0;k<=4;k++){ if(k==j)continue; for(l=0;l<=4;l++){ if(l==k||l==j)continue; for(m=0;m<=4;m++){ if(m==3||m==k||m==j||m==l)continue; for(n=0;n<=4;n++){ if(n==m||n==l||n==k||n==j||n==3)continue; i++; cout<<"比赛名单为:"< #include using namespace std; double sroot(double a); int main(){ double a,x; cout<<"Please input a value:\n"; cin>>a; if(a<0)cout<<"Input error!"< using namespace std; double add(double a,double b){ return(a+b); } double minus(double a,double b){ return(a-b); } double muliti(double a,double b){ return(a*b); } double div(double a,double b){ return(a/b); } double Calculate(double a,double b,char c){ double d; switch(c){ case'+':return add(a,b); case'-':d=minus(a,b);return d; case'*':d=muliti(a,b);return d; case'/':d=div(a,b);return d; case'#':return 0; default:cout<<"输入有误~"; } } int main() { double a,b,d; char c; do { cout<<"请输入运算式"<>c>>a>>b; d=Calculate(a,b,c); cout<<"结果为"< using namespace std; int max(int num1,int num2){ int min; min=(num1>=num2?num2:num1); for(;min>0;min--){ if(num1%min==0&&num2%min==0)break; } return min; } int min(int num1,int num2){ int max; max=(num1>=num2?num1:num2); for(;;max++){ if(max%num1==0&&max%num2==0)break; } return max; } int main(){ int num1,num2; do{ cout<<"请输入两个整数:"<>num1>>num2; cout< #include using namespace std; int prime(int m) { int i,n; if(m==1)return 0; n=(int)sqrt((double)m); for(i=2;i<=n;i++) if(m%i==0)return 0; return 1; } void main() { int count,i,number; count=0; for(number=4;number<=50;number=number+2) { for(i=2;i<=number/2;i=i+1) if(prime(i)&&prime(number-i)) { cout< using namespace std; long com(int,int),fac(int); int main(){ int m,n; cout<<"Please input two numbers m,n(m<=n):"<>m>>n; if(m<=n)cout<<"C(m,n)="< using namespace std; double num(int,double); int main() { int n,double x; cout<<"请输入两个数字n和x,其中n为非负整数\n"; cin>>n>>x; if(n<0) cout<<"输入错误\n"; else cout<<"勒让德多项式Pn(x)="< #include using namespace std; const double PI=3.14159; double area(double rad=0); double area(double a,double b); double area(double a,double b,double h); double area(double a,double b,double c,int); int main(){ cout<<"Area of paint is "<0.5) i=(int)a+1; else i=(int)a; if(b-(int)b>0.5) j=(int)b+1; else j=(int)b; return (i%j);} 实验十 //范例:设计并测试一个矩形类(Rectangle)。属性为矩形的左下角与右上角的坐标,矩形水平放置。操作为计算矩形的周长和面积。 #include #include using namespace std; class Rectangle{ float left,top; float right,bottom; public: Rectangle(float l=0,float t=0,float r=0,float b=0); ~Rectangle(){}; void Assign(float l,float t,float r,float b); void Show(); float Area(); float Perimeter(); }; Rectangle::Rectangle(float l,float t,float r, float b){ left=l; top=t; right=r; bottom=b; } void Rectangle::Assign(float l,float t,float r,float b){ left=l; top=t; right=r; bottom=b; } void Rectangle::Show(){ cout<<"left-top point is("< const double PI=3.14159; //方法一 class circle1{ private: double radius; public: void Setradius(double a){ radius=a;} double perimeter(){ return(2*PI*radius);} double area(){ return(PI*radius*radius);} }; //方法二 class circle2{ private: double radius,perimeter,area; public: circle2(double a=0){ radius=a; perimeter=2*PI*a; area=PI*a*a;} circle2(const circle2&a){ radius=a.radius; perimeter=a.perimeter; area=a.area;} void Setcircle2(double a){ radius=a; perimeter=2*PI*a; area=PI*a*a;} void result(){ cout<<"半径"< #include class person{ private: string IdPerson,Name,Sex,Birthday,HomeAddress; public: void SetIdPerson(string a){ IdPerson=a;} void SetName(string a){ Name=a;} void SetSex(string a){ Sex=a;} void SetBirthday(string a){ Birthday=a;} void SetHomeAddress(string a){ HomeAddress=a;} void coutIdPerson(){ cout<<"身份证号"< using namespace std; const int m=5; void Index(int a[],int n,int & sub); int main(){ int b[25]={2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59 ,61,67,71,73,79,83,89,97}; int n=25,k,sub; for(k=0;k>sub; Index(b,n,sub); if(sub!=-1) cout<<"对应元素下标为:"< using namespace std; const int m=5; int asub; void Index(int a[],int n,int sub); int main(){ int b[25]={2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59 ,61,67,71,73,79,83,89,97}; int n=25,k,sub; for(k=0;k>sub; Index(b,n,sub); if(asub!=-1) cout<<"对应元素下标为:"< #include"rect.h" using namespace std; Rectangle::Rectangle(int l,int t,int r,int b){ left=l;top=t; right=r;bottom=b;} Rectangle::Rectangle(Rectangle & rec){ left=rec.left; top=rec.top; right=rec.right; bottom=rec.bottom;} void Rectangle::Assign(int l,int t,int r,int b){ left=l;top=t; right=r;bottom=b;} void Rectangle::Show(){ cout<<"left-top point is("< #include"rect.h" using namespace std; int main(){ Rectangle rect; cout<<"由默认的构造函数生成的rect:"< using namespace std; int max_value(int array[][4],int k); int main(){ int a[3][4]={{1,3,6,7},{2,4,6,8},{15,17,34,12}}; cout<max) max=array[i][j]; return (max);} //修改后的结果 #include using namespace std; int main(){ int array[3][4]={{1,3,6,7},{2,4,6,8},{15,17,34,12}}; int i,j,m,n,max=array[0][0]; for(i=0;i<3;i++) for(j=0;j<4;j++) if(array[i][j]>max){ max=array[i][j]; m=i+1;n=j+1;} cout< #include using namespace std; int main(){ int i,j; int array[10][10]; for(i=0;i<10;i++) if(i==0) cout<<"1"< #include using namespace std; void trim(char s[]); void lefstring(char s1[],char s2[],int n); int index(char s1[],char s2[]); int main(){ char str1[]="I'm student.",str2[]="student",str3[4]; int n; cout<<"包含尾部空格的串str1:"< using namespace std; void itoa0(int n,char s[],int b); int main(){ int m; char a[50]; cout<<"请输入一个十进制整数"; cin>>m; itoa0(m,a,16); cout<9){ s[i]+='A'-10; }else{ s[i]+='0'; } n/=b; i++; }while(n!=0); s[i]='\0'; //将s数组逆转 for(int j=0; j #include using namespace std; const SIZE=100; int main(){ char carray[SIZE]; int i,len,is_palindrome=1; cout<<"Please input a string.\n"; cin.get(carray,SIZE); len=strlen(carray); for(i=0;i #include using namespace std; const SIZE=100; int main(){ char carray[SIZE]; int i,len,is_palindrome=1; cout<<"Please input a string..\n"; cin.get(carray,SIZE); for(i=0;i90||carray[i]<97||carray[i]>122) carray[i]='\0'; len=strlen(carray); for(i=0;i #include using namespace std; const SIZE=100; int main(){ char carray[SIZE]; int i,len,is_palindrome=1; char *p; p=carray; cout<<"Please input a string..\n"; cin.get(carray,SIZE); for(i=0;i90||p[i]<97||p[i]>122) p[i]='\0'; len=strlen(p); for(i=0;i using namespace std; void secret(char s[]); void desecret(char *s); int main(){ char st[]="This is a secret code!"; cout<< st<< endl; secret(st); cout<< st<< endl; desecret(st); cout<< st<< endl; return 0; } void secret(char s[]){ int i=0; while( s[i]!='\0'){ if(s[i]>=97 && s[i]<122) s[i]=s[i]++; else if(s[i]==122) s[i]='a'; i++; } } void desecret(char *s){ while (*s!='\0'){ if(*s>97 && *s<=122) *s=(*s)--; else if(*s==97) *s='z'; s++; } } //问题(1) #include using namespace std; void secret(char s[]); void desecret(char *s); int main(){ char st[]="I am a boy ! !"; cout<< st<< endl; secret(st); cout<< st<< endl; desecret(st); cout<< st<< endl; return 0; } void secret(char s[]){ int i=0; while( s[i]!='\0'){ if(s[i]>=97 && s[i]<122) s[i]=s[i]++; if(s[i]==122) s[i]='a'; i++; } } void desecret(char *s){ while (*s!='\0'){ if(*s>97 && *s<=122) *s=(*s)--; if(*s==97) *s='z'; s++; } } //问题(2) #include using namespace std; void secret(char s[]); void desecret(char *s); int main(){ char st[]="I am a boy"; cout<< st<< endl; secret(st); cout<< st<< endl; desecret(st); cout<< st<< endl; return 0; } void secret(char s[]){ int i=0; while( s[i]!='\0'){ s[i]=(s[i]+150)%128; i++; } } void desecret(char *s){ while(*s!='\0'){ for(int i=0;i<2;i++){ char c=i*128+*s-150; if(c>=65&&c<=90||c>=97&&c<=122||c==32){*s=c; break;} } s++; } } //编程:重新编写实验十三中题3的字符串处理函数,用指针作为参数。 #include #include using namespace std; void trim(char s[]); void leftstring(char *s1,char *s2,int n); int index(char *s1,char *s2); int main(){ char str1[]="I'm a student. ",str2[]="student",str3[4]; int n; cout<<"包含尾数空格的串str1:"< #include using namespace std; const PI=3.14159; class Point{ friend class Line; protected: double x,y; public: Point(){x=0;y=0;} Point(double xv,double yv){x=xv;y=yv;} double Area(){return 0;} void Show(){ cout<<"x="< #include using namespace std; const PI=3.14159; class Point{ friend class Line; protected: double x,y; public: Point(){x=0;y=0;} Point(double xv,double yv){x=xv;y=yv;} double Area(){return 0;} void Show(){ cout<<"x="< using namespace std; class figure{ protected: double x,y; public: void set_dim(double i,double j=0) { x=i; y=j; } virtual void show_area() { cout<<"No area computation defined for this class.\n"; } }; class triangle:public figure{ public: void show_area() { cout<<"Triangle with height "<< x<<" and base "<< y<<" has an area of "<< x*0.5*y<< endl; } }; class square:public figure{ public: void show_area() { cout<<"Square with dimensions "<< x<<" and "<< y<<" has an area of "<< x*y<< endl; } }; class circle:public figure{ public: void show_area() { cout<<"Circle with radius "<< x<<" has an area of "<<3.14159*x*x<< endl; } }; int main(){ figure *p; triangle t; square s; circle c; p=&t; p->set_dim(10.0,5.0); p->show_area(); p=&s; p->set_dim(10.0,5.0); p->show_area(); p=&c; p->set_dim(10.0); p->show_area(); return 0; }
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