数组和向量

代码示例

1早餐: 400  
2午餐: 600  

1#include <vector>
2#include <iostream>
3using namespace std;
4
5int main() {
6    vector<int> calories; // 声明一个空的向量
7    calories.push_back(400);
8    calories.push_back(600);
9    calories.push_back(300);
10
11    cout << "餐食热量: ";
12    for (int cal : calories) {
13        cout << cal << " ";
14    }
15    cout << endl;
16
17    return 0;
18}

代码示例

1vector<int> meals = {400, 600, 300};

1#include <iostream>
2using namespace std;
3
4int main() {
5    int meals[3] = {400, 600, 300};
6    int total = 0;
7
8    for (int i = 0; i < 3; i++) {
9        total += meals[i];
10    }
11
12    cout << "一天的总热量: " << total << endl;
13    return 0;
14}

1#include <iostream>
2#include <vector>
3using namespace std;
4
5int main() {
6    vector<int> meals;
7    meals.push_back(400);
8    meals.push_back(600);
9    meals.push_back(300);
10
11    int total = 0;
12    for (int cal : meals) {
13        total += cal;
14    }
15
16    cout << "一天的总热量: " << total << endl;
17    return 0;
18}

代码示例

1输入第1天的餐食（用逗号分隔）：早餐,午餐,晚餐
2输入第1天餐食的热量（用逗号分隔）：400,600,300
3
4第1天餐食：早餐, 午餐, 晚餐
5第1天总热量：1300
6
7输入第2天的餐食（用逗号分隔）：早餐,午餐,晚餐
8输入第2天餐食的热量（用逗号分隔）：500,700,250
9
10第2天餐食：早餐, 午餐, 晚餐
11第2天总热量：1450
12
13一周总热量：2750
14很棒，坚持记录你的餐食！

1#include <iostream>
2#include <sstream>
3#include <vector>
4using namespace std;
5
6int main() {
7    int weekly_total = 0; // 存储一周的总热量
8
9    for (int day = 1; day <= 2; day++) { // 为测试尝试使用2天
10        string meal_input, calorie_input;
11
12        cout << "输入第 " << day << " 天的餐食（用逗号分隔）: ";
13        getline(cin, meal_input);
14
15        cout << "输入第 " << day << " 天餐食的热量（用逗号分隔）: ";
16        getline(cin, calorie_input);
17
18        // 将 meal_input 拆分为字符串向量
19        vector<string> meals;
20        stringstream meal_stream(meal_input);
21        string meal;
22        while (getline(meal_stream, meal, ',')) {
23            meals.push_back(meal);
24        }
25
26        // 将 calorie_input 拆分为整数向量
27        vector<int> calories;
28        stringstream cal_stream(calorie_input);
29        string cal;
30        while (getline(cal_stream, cal, ',')) {
31            calories.push_back(stoi(cal));
32        }
33
34        int day_total = 0;
35        for (int c : calories) {
36            day_total += c;
37        }
38
39        cout << "\n第 " << day << " 天餐食: ";
40        for (int i = 0; i < meals.size(); i++) {
41            cout << meals[i];
42            if (i != meals.size() - 1) cout << ", ";
43        }
44
45        cout << "\n第 " << day << " 天总热量: " << day_total << "\n" << endl;
46
47        weekly_total += day_total;
48    }
49
50    cout << "一周总热量: " << weekly_total << endl;
51    cout << "很棒，坚持记录你的餐食！" << endl;
52
53    return 0;
54}

1#include <iostream>
2#include <sstream>
3#include <vector>
4using namespace std;
5
6int main() {
7    int weekly_total = 0; // 存储一周的总热量
8
9    for (int day = 1; day <= 2; day++) { // 为测试尝试使用2天
10        string meal_input, calorie_input;
11
12        cout << "输入第 " << day << " 天的餐食（用逗号分隔）: ";
13        getline(cin, meal_input);
14
15        cout << "输入第 " << day << " 天餐食的热量（用逗号分隔）: ";
16        getline(cin, calorie_input);
17
18        // 将 meal_input 拆分为字符串向量
19        vector<string> meals;
20        stringstream meal_stream(meal_input);
21        string meal;
22        while (getline(meal_stream, meal, ',')) {
23            meals.push_back(meal);
24        }
25
26        // 将 calorie_input 拆分为整数向量
27        vector<int> calories;
28        stringstream cal_stream(calorie_input);
29        string cal;
30        while (getline(cal_stream, cal, ',')) {
31            calories.push_back(stoi(cal));
32        }
33
34        int day_total = 0;
35        for (int c : calories) {
36            day_total += c;
37        }
38
39        cout << "\n第 " << day << " 天餐食: ";
40        for (int i = 0; i < meals.size(); i++) {
41            cout << meals[i];
42            if (i != meals.size() - 1) cout << ", ";
43        }
44
45        cout << "\n第 " << day << " 天总热量: " << day_total << "\n" << endl;
46
47        weekly_total += day_total;
48    }
49
50    cout << "一周总热量: " << weekly_total << endl;
51    cout << "很棒，坚持记录你的餐食！" << endl;
52
53    return 0;
54}

代码示例

1今天吃了多少零食？ 3  
2输入零食名称：薯片  
3输入零食热量：150  
4输入零食名称：果汁  
5输入零食热量：200  
6输入零食名称：饼干  
7输入零食热量：100  
8
9今天的零食：['薯片', '果汁', '饼干']  
10今天零食数量：3  
11热量：[150, 200, 100]  
12零食总热量：450  
13记得用健康餐食来平衡你的零食摄入！

1#include <iostream>
2#include <vector>
3using namespace std;
4
5void snack_tracker() {
6    int num_snacks;
7    cout << "今天吃了多少零食？ ";
8    cin >> num_snacks;
9    cin.ignore();
10
11    vector<string> snacks;
12    vector<int> calories;
13
14    for (int i = 0; i < num_snacks; i++) {
15        string snack;
16        int cal;
17
18        cout << "输入零食名称：";
19        getline(cin, snack);
20        snacks.push_back(snack);
21
22        cout << "输入零食热量：";
23        cin >> cal;
24        cin.ignore();
25        calories.push_back(cal);
26    }
27
28    cout << "\n今天的零食：";
29    for (int i = 0; i < snacks.size(); i++) {
30        cout << snacks[i];
31        if (i != snacks.size() - 1) cout << ", ";
32    }
33
34    cout << "\n今天零食数量： " << snacks.size() << endl;
35
36    cout << "热量：";
37    int total_calories = 0;
38    for (int cal : calories) {
39        cout << cal << " ";
40        total_calories += cal;
41    }
42
43    cout << "\n零食总热量： " << total_calories << endl;
44    cout << "记得用健康餐食来平衡你的零食摄入！" << endl;
45}
46
47int main() {
48    snack_tracker();
49    return 0;
50}

1#include <iostream>
2#include <vector>
3using namespace std;
4
5void snack_tracker() {
6    int num_snacks;
7    cout << "今天吃了多少零食？ ";
8    cin >> num_snacks;
9    cin.ignore();
10
11    vector<string> snacks;
12    vector<int> calories;
13
14    for (int i = 0; i < num_snacks; i++) {
15        string snack;
16        int cal;
17
18        cout << "输入零食名称：";
19        getline(cin, snack);
20        snacks.push_back(snack);
21
22        cout << "输入零食热量：";
23        cin >> cal;
24        cin.ignore();
25        calories.push_back(cal);
26    }
27
28    cout << "\n今天的零食：";
29    for (int i = 0; i < snacks.size(); i++) {
30        cout << snacks[i];
31        if (i != snacks.size() - 1) cout << ", ";
32    }
33
34    cout << "\n今天零食数量： " << snacks.size() << endl;
35
36    cout << "热量：";
37    int total_calories = 0;
38    for (int cal : calories) {
39        cout << cal << " ";
40        total_calories += cal;
41    }
42
43    cout << "\n零食总热量： " << total_calories << endl;
44    cout << "记得用健康餐食来平衡你的零食摄入！" << endl;
45}
46
47int main() {
48    snack_tracker();
49    return 0;
50}