35題:
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#include?stdio.h
main()
{
int?i,?sum=0;
for(i=1;?i50;?i=i+2)
sum?+=?i?*?(i+1);
printf("result=%d\n",?sum);
}
38題:
#include?stdio.h
main()
{
int?a[10],?i,?sum=0,?squaresum=0;
printf("please?input?10?number:");
scanf("%d?%d?%d?%d?%d?%d?%d?%d?%d?%d",?a[0],a[1],a[2],a[3],a[4],a[5],a[6],a[7],a[8],a[9]);
for(i=0;?i10;?i++)
{sum?+=?a[i];?squaresum?+=?a[i]*a[i];}
printf("sum=%d??sum?of?squaue=%d\n",?sum,?squaresum);
}
#include iostream
using namespace std;
class Shape //定義抽象基類 Shape
{
public:
virtual double area() const =0; //純虛函數(shù)
};
class Circle:public Shape
{
public:
Circle(double r):radius(r){} //構(gòu)造函數(shù)
virtual double area() const //定義虛函數(shù)
{
return 3.14159*radius*radius;
};
protected:
double radius;
};
class Square:public Shape //定義 Square(正方形)類
{
public:
Square(double s):side(s){}
virtual double area() const {return side*side;}//定義虛函 數(shù)
protected:
double side;
};
class Rectangle:public Shape //定義 Rectangle(矩形)類
{
public:
Rectangle(double w,double h):width(w),height(h){}//構(gòu)造函數(shù)
virtual double area() const {return width*height;}//定義虛函數(shù)
protected:
double width,height;
};
class Trapezoid:public Shape //定義 Trapezoid(梯形)類
{
public:
Trapezoid(double t,double b,doubleh):top(t),bottom(t),height(h){} //構(gòu)造函數(shù)
virtual double area() const {return0.5*(top+bottom)*height;} //定義虛函數(shù)
protected:
double top,bottom,height;//上底、下底與高
};
class Triangle:public Shape//定義 Triangle(三角形)類
{
public:
Triangle(double w,double h):width(w),height(h){}//構(gòu)造函數(shù)
virtual double area() const {return 0.5*width*height;} //定義虛
protected:
double width,height;
};
int main()
{
Circle circle(12.6);//建立Circle 類對(duì)象 circle
Square square(3.5);//建立Square 類對(duì)象 square
Rectangle rectangle(4.5,8.4);//建立Rectangle 類對(duì)象 rectangle
Trapezoid trapezoid(2.0,4.5,3.2);//建立 Trapezoid 類對(duì)象 trapezoid
Triangle triangle(4.5,8.4);//建立Triangle 類對(duì)象
Shape *pt[5]={circle,square,rectangle,trapezoid,triangle}; //定義基類指針數(shù)組 pt,使它每一個(gè)元素指向一個(gè)派生類對(duì)象
double areas=0.0;//areas 為總面積
for(int i=0;i5;i++)
{
areas=areas+pt[i]-area();
}
cout"totol of all areas="areasendl; //輸出總面積
return 0;
}
#include stdio.h
int main(void)
{
int num=1;
int squa=0;
printf("number\tsquare\n");
for(num=1;num=100;num++)
{
squa=(num*num);
if(squa/100)
{if(squa%10==squa/100)
printf("%d\t%d\n",num,squa);}
else if(squa/10)
{if(squa%10==squa/10)
printf("%d\t%d\n",num,squa);}
else if(squa0squa10)
printf("%d\t%d\n",num,squa);
}
return 0;
}
調(diào)好的
1.h 如下:
#include math.h
class CPolygon {
protected:
int length;
public:
void set_values (int a) {length=a;}
virtual int perimeter(void){return 1;}
virtual double area(void){return 1;}
};
class CSquare: public CPolygon {
public:
int perimeter(void){return length*4;}
double area (void){ return (length * length); }
};
class CTriangle: public CPolygon {
public:
int perimeter(void){return length*3;}
double area (void){ return (length * length * sqrt(3) / 4); }
};
2.cpp 如下:
#include iostream.h
#include "1.h"
int main () {
CSquare squa;
CTriangle trgl;
squa.set_values (4);
trgl.set_values (4);
cout squa.area() endl;
cout trgl.area() endl;
return 0;
}
本文題目:squa函數(shù)c語言 c語言srand函數(shù)的用法
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