Requirements:
1. Use overloaded functions to calculate the area of circles, rectangles, trapezoids, and triangles. If no parameters are specified for circle area calculation, the area of the unit circle will be calculated;
2. Obtain the program input, file path and file path from a text file The name is: D:\Test.txt
3. The input format is as follows:
single character [] parameter 1[] parameter 2[]...<carriage return and line feed>
Description:
(1) Separate by spaces, and end a group of inputs with carriage return and line feed , And then read the next line of input until the end of the file;
(2) A single character represents the shape type: C (circle) Parameters: radius
R (rectangular) Parameters: length, width
L (trapezoid) Parameters: top bottom, bottom bottom, High
T (triangular) parameters: bottom, high
(3) If the number of input parameters is greater than the required number of parameters, the redundant input will be ignored; if the number of input parameters is less than the required number of parameters, the previous input value will be called (if there is an input before ) Or 0 (if there is no input before);
(4) The calculation of the circle area, given the default parameters, output the area of the unit circle;
4. The output result is displayed in the console, and the format is as follows:
XX-shaped area = XXXXXX
5. Code Neat and standard
6. Attached operation result diagram, and explain and analyze the test case, test purpose, and operation result.
C++ implementation code:
#include <fstream>
#include <sstream>
#include <iostream>
#include <vector>
#include <string>
#include <stdlib.h>
using namespace std;
double Area(double r = 1);//计算圆形的面积
double Area(double length, double width);//计算矩形的面积
double Area(double uSide, double lSide, double height);//计算梯形的面积
double Area(double lSide, double height, int i);//计算三角形的面积，为与计算矩形的
//面积区分开来，增加一个输入参数int i；
int main()
{
char ch[256];
int i;
float result; //最终结果
float backup[20][10]; //用于备份记录每一轮输入的数据
float Num[10]; //存放每一轮float类型数据
int k = 0; //记录轮数
string tempName;
ifstream ifile;
ifile.open("D:\\我学你妹\\大三上\\面向对象程序设计\\实验\\Test.txt");
do
{
ifile.getline(ch, 255); //按行读取字符串
//将得到的字符串按空格切割放入数组
char* p;
vector<string> num; //字符串数组
const char* delim = " ";
p = strtok(ch, delim);
while (p)
{
i = 0;
string s = p;
num.push_back(s);
p = strtok(NULL, delim);
i++;
}
//将数组中的字符转换为float类型
for (int i = 0; i < num.size(); ++i)
{
Num[i] = atof(num[i].c_str());
//std::cout << "b=" << Num[i] << std::endl;
backup[k][i] = Num[i]; //备份
}
k++;
if (ch[0] == 'C')
{
tempName = "圆形";
if (Num[1] != NULL)
{
result = Area(Num[1]);
}
else
{
result = Area();//利用默认参数求单位圆面积
}
}
else if (ch[0] == 'R')
{
tempName = "矩形";
if (Num[2] != NULL)
{
result = Area(Num[1], Num[2]);
}
else
{
result = Area(Num[1], backup[k-2][1]);
}
}
else if (ch[0] == 'L')
{
tempName = "梯形";
if (Num[3] != NULL) //从后往前判断是否有数据输入，如果没有则从备份数据中提取
{
result = Area(Num[1], Num[2], Num[3]);
}
else if (Num[2] != NULL )
{
result = Area(Num[1], Num[2], backup[k - 2][1]);
}
else if (Num[1] != NULL)
{
if (backup[k - 2][2] != NULL)
{
result = Area(Num[1], backup[k - 2][1], backup[k - 2][2]);
}
else
{
result = Area(Num[1], backup[k - 2][1], backup[k - 3][1]);
}
}
}
else if (ch[0] == 'T')
{
tempName = "三角形";
if (Num[2] != NULL)
{
result = Area(Num[1], Num[2],1);
}
else
{
result = Area(Num[1], backup[k - 2][1],1);
}
}
cout << tempName << "面积 = " << result << endl;
} while (ifile.eof() == 0);
ifile.close();
return 0;
}
double Area(double r)
{
return (3.14) * r * r;
}
double Area(double length, double width) {
return length * width;
}
double Area(double uSide, double lSide, double height) {
return (uSide + lSide)*height / 2;
}
double Area(double lSide, double height, int i) {
return lSide * height / 2;
}
Input data:
program running result:
