C++ Primer Plus 第六版第三章课后编程练习答案

2017-10-30 4条评论 12,619次阅读 12人点赞

编程环境Visual Studio 2017

#include <iostream>

using std::cout;
using std::cin;
using std::endl;


//practice 1
const int Foot2Inch = 12;
void p3_1(void)
{
    int inch_input = 0;
    int inch_output = 0;
    int foot = 0;

    cout << "Please input you height in inch:___\b\b\b";
    cin >> inch_input;
    foot = inch_input / Foot2Inch;
    inch_output = inch_input % Foot2Inch;

    cout << "Your height in inch was: " << inch_input << "; Your height in foot and inch was: " << foot << " foot " << inch_output << " inch!" << endl;

    return;
}


// practice 2
const double Inch2Meter = 0.254;
const double Kilo2Pound = 2.2;
void p3_2(void)
{
    double height_foot = 0.0;
    double height_inch = 0.0;
    double height_meter = 0.0;
    double weight_pound = 0.0;
    double weight_kilo = 0.0;
    double BMI = 0.0;

    cout << "Enter your height in foot and inch" << endl;
    cout << "First enter the foot: ";
    cin >> height_foot;
    cout << "Second enter the inch: ";
    cin >> height_inch;

    cout << "Enter you weight in pound: ";
    cin >> weight_pound;

    height_meter = (height_foot * Foot2Inch + height_inch) * Inch2Meter;
    weight_kilo = weight_pound / Kilo2Pound;

    BMI = weight_kilo / (height_meter * height_meter);

    cout << "Your BIM is " << BMI << endl;
}


// practice 3
void p3_3(void)
{
    int degrees = 0;
    int minutes = 0;
    int seconds = 0;
    double total = 0.0;

    cout << "Enter a latitude in degrees, minute and seconds:" << endl;
    cout << "First, enter the degrees: ";
    cin >> degrees;
    cout << "Next, enter the minucts of arc: ";
    cin >> minutes;
    cout << "Finally, enter the seconds of arc: ";
    cin >> seconds;

    total = degrees + minutes / 60.0 + seconds / 3600.0;
    cout << degrees << " degrees, " << minutes << " minutes, " << seconds << " seconds = " << total << " degrees." << endl;
}


// practice 4
void p3_4(void)
{
    long long total_seconds = 0;
    int days = 0;
    int hours = 0;
    int minutes = 0;
    int seconds = 0;

    cout << "Enter the number of seconds: ";
    cin >> total_seconds;

    days = total_seconds / (24 * 60 * 60);
    hours = ((total_seconds % (24 * 60 * 60)) / (60 * 60));
    minutes = ((total_seconds % (60 * 60)) / 60);
    seconds = (total_seconds % 60);

    cout << total_seconds << " seconds = " << days << " days, " << hours << " hours, " << minutes << " minutes, " << seconds << " seconds" << endl;
}


// practice 5
void p3_5(void)
{
    long long world_population = 0;
    long long US_population = 0;
    double rate = 0.0;

    cout << "Enter the world's population :";
    cin >> world_population;

    cout << "Enter the population of the US: ";
    cin >> US_population;

    rate = double(US_population) / (world_population);
    cout << "The population of the US is " << rate * 100 << "% of the world population." << endl;
}


// practice 6
void p3_6(void)
{
    double mile = 0.0;
    double gallon = 0.0;
    double mile_per_gallon = 0.0;

    cout << "Enter the distance in mile you drive: ";
    cin >> mile;
    cout << "Enter the comsumption of oil: ";
    cin >> gallon;

    mile_per_gallon = mile / gallon;
    cout << "Average fuel comsuption: " << mile_per_gallon << " mile/gallon" << endl;
}


// practice 7
void p3_7(void)
{
    double fuel_comsuption_eu = 0.0;
    double fuel_comsuption_us = 0.0;

    cout << "Enter the fuel comsuption in Europ standard: ";
    cin >> fuel_comsuption_eu;

    fuel_comsuption_us = fuel_comsuption_eu / 19 * 12.41;
    cout << "the fuel comsuption in US standard is " << fuel_comsuption_us << "/100KM" << endl;
}


int main(int argc, char **argv)
{
    p3_7();

    while (getchar());

    return 0;
}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

#include <iostream>

using std::cout;

using std::cin;

using std::endl;

//practice 1

const int Foot2Inch = 12;

void p3_1(void)

{

int inch_input = 0;

int inch_output = 0;

int foot = 0;

cout << "Please input you height in inch:___\b\b\b";

cin >> inch_input;

foot = inch_input / Foot2Inch;

inch_output = inch_input % Foot2Inch;

cout << "Your height in inch was: " << inch_input << "; Your height in foot and inch was: " << foot << " foot " << inch_output << " inch!" << endl;

return;

}

// practice 2

const double Inch2Meter = 0.254;

const double Kilo2Pound = 2.2;

void p3_2(void)

{

double height_foot = 0.0;

double height_inch = 0.0;

double height_meter = 0.0;

double weight_pound = 0.0;

double weight_kilo = 0.0;

double BMI = 0.0;

cout << "Enter your height in foot and inch" << endl;

cout << "First enter the foot: ";

cin >> height_foot;

cout << "Second enter the inch: ";

cin >> height_inch;

cout << "Enter you weight in pound: ";

cin >> weight_pound;

height_meter = (height_foot * Foot2Inch + height_inch) * Inch2Meter;

weight_kilo = weight_pound / Kilo2Pound;

BMI = weight_kilo / (height_meter * height_meter);

cout << "Your BIM is " << BMI << endl;

}

// practice 3

void p3_3(void)

{

int degrees = 0;

int minutes = 0;

int seconds = 0;

double total = 0.0;

cout << "Enter a latitude in degrees, minute and seconds:" << endl;

cout << "First, enter the degrees: ";

cin >> degrees;

cout << "Next, enter the minucts of arc: ";

cin >> minutes;

cout << "Finally, enter the seconds of arc: ";

cin >> seconds;

total = degrees + minutes / 60.0 + seconds / 3600.0;

cout << degrees << " degrees, " << minutes << " minutes, " << seconds << " seconds = " << total << " degrees." << endl;

}

// practice 4

void p3_4(void)

{

long long total_seconds = 0;

int days = 0;

int hours = 0;

int minutes = 0;

int seconds = 0;

cout << "Enter the number of seconds: ";

cin >> total_seconds;

days = total_seconds / (24 * 60 * 60);

hours = ((total_seconds % (24 * 60 * 60)) / (60 * 60));

minutes = ((total_seconds % (60 * 60)) / 60);

seconds = (total_seconds % 60);

cout << total_seconds << " seconds = " << days << " days, " << hours << " hours, " << minutes << " minutes, " << seconds << " seconds" << endl;

}

// practice 5

void p3_5(void)

{

long long world_population = 0;

long long US_population = 0;

double rate = 0.0;

cout << "Enter the world's population :";

cin >> world_population;

cout << "Enter the population of the US: ";

cin >> US_population;

rate = double(US_population) / (world_population);

cout << "The population of the US is " << rate * 100 << "% of the world population." << endl;

}

// practice 6

void p3_6(void)

{

double mile = 0.0;

double gallon = 0.0;

double mile_per_gallon = 0.0;

cout << "Enter the distance in mile you drive: ";

cin >> mile;

cout << "Enter the comsumption of oil: ";

cin >> gallon;

mile_per_gallon = mile / gallon;

cout << "Average fuel comsuption: " << mile_per_gallon << " mile/gallon" << endl;

}

// practice 7

void p3_7(void)

{

double fuel_comsuption_eu = 0.0;

double fuel_comsuption_us = 0.0;

cout << "Enter the fuel comsuption in Europ standard: ";

cin >> fuel_comsuption_eu;

fuel_comsuption_us = fuel_comsuption_eu / 19 * 12.41;

cout << "the fuel comsuption in US standard is " << fuel_comsuption_us << "/100KM" << endl;

}

int main(int argc, char **argv)

{

p3_7();

while (getchar());

return 0;

}

此文为博主原创文章，转载请标明出处

Jimmy's Blog

Jimmy Chen

C++ Primer Plus 第六版第三章课后编程练习答案

赞过：

相关

本作品采用知识共享署名-相同方式共享 4.0 国际许可协议进行许可

发表回复取消回复

Jimmy Chen

赞过：

相关

本作品采用 知识共享署名-相同方式共享 4.0 国际许可协议 进行许可

发表回复 取消回复

本作品采用知识共享署名-相同方式共享 4.0 国际许可协议进行许可

发表回复取消回复