用 while 循环处理持续输入

1#include <iostream>
2using namespace std;
3
4int main() {
5    int count = 1;
6
7    while (count <= 5) {
8        cout << "This is loop number " << count << endl;
9        count = count + 1;
10    }
11
12    return 0;
13}

代码示例

1Enter your steps (or type 'done' to finish): 3000  
2Enter your steps (or type 'done' to finish): 4500  
3Enter your steps (or type 'done' to finish): 2200  
4Enter your steps (or type 'done' to finish): done  
5
6Total steps: 9700  
7Great job staying active!  

1#include <iostream>
2#include <string>
3using namespace std;
4
5int main() {
6    int total_steps = 0;
7    string user_input;
8
9    cout << "Enter your steps (or type 'done' to finish): ";
10    getline(cin, user_input);
11
12    while (user_input != "done") {
13        bool is_number = true;
14
15        // Validate input
16        for (char c : user_input) {
17            if (!isdigit(c)) {
18                is_number = false;
19                break;
20            }
21        }
22
23        if (is_number) {
24            int steps = stoi(user_input);
25            total_steps += steps;
26        } else {
27            cout << "Invalid input. Please enter a number or 'done'." << endl;
28        }
29
30        cout << "Enter your steps (or type 'done' to finish): ";
31        getline(cin, user_input);
32    }
33
34    cout << "\nTotal steps: " << total_steps << endl;
35    cout << "Great job staying active!" << endl;
36
37    return 0;
38}

1#include <iostream>
2#include <string>
3using namespace std;
4
5int main() {
6    int total_steps = 0;
7    string user_input;
8
9    cout << "Enter your steps (or type 'done' to finish): ";
10    getline(cin, user_input);
11
12    while (user_input != "done") {
13        bool is_number = true;
14
15        // Validate input
16        for (char c : user_input) {
17            if (!isdigit(c)) {
18                is_number = false;
19                break;
20            }
21        }
22
23        if (is_number) {
24            int steps = stoi(user_input);
25            total_steps += steps;
26        } else {
27            cout << "Invalid input. Please enter a number or 'done'." << endl;
28        }
29
30        cout << "Enter your steps (or type 'done' to finish): ";
31        getline(cin, user_input);
32    }
33
34    cout << "\nTotal steps: " << total_steps << endl;
35    cout << "Great job staying active!" << endl;
36
37    return 0;
38}

代码示例

1Enter your daily step goal: 5000  
2Enter steps taken (or type 'done' to finish): 1200  
3Enter steps taken (or type 'done' to finish): 2500  
4Enter steps taken (or type 'done' to finish): done  
5
6Total steps taken: 3700  
7Steps left to reach your goal: 1300  
8Keep moving and stay active!

1#include <iostream>
2#include <string>
3using namespace std;
4
5int main() {
6    // --- Goal Input ---
7    string goal_input;
8    int goal = 0;
9
10    cout << "Enter your daily step goal: ";
11    getline(cin, goal_input);
12    goal = stoi(goal_input);
13
14    int total_steps = 0;
15    string user_input;
16
17    cout << "Enter steps taken (or type 'done' to finish): ";
18    getline(cin, user_input);
19
20    while (user_input != "done") {
21        bool is_number = true;
22
23        for (char c : user_input) {
24            if (!isdigit(c)) {
25                is_number = false;
26                break;
27            }
28        }
29
30        if (is_number) {
31            int steps = stoi(user_input);
32            total_steps += steps;
33        } else {
34            cout << "Invalid input. Please enter a number or 'done'." << endl;
35        }
36
37        cout << "Enter steps taken (or type 'done' to finish): ";
38        getline(cin, user_input);
39    }
40
41    int steps_left = goal - total_steps;
42
43    cout << "\nTotal steps taken: " << total_steps << endl;
44    cout << "Steps left to reach your goal: " << steps_left << endl;
45    cout << "Keep moving and stay active!" << endl;
46
47    return 0;
48}

1#include <iostream>
2#include <string>
3using namespace std;
4
5int main() {
6    // --- Goal Input ---
7    string goal_input;
8    int goal = 0;
9
10    cout << "Enter your daily step goal: ";
11    getline(cin, goal_input);
12    goal = stoi(goal_input);
13
14    int total_steps = 0;
15    string user_input;
16
17    cout << "Enter steps taken (or type 'done' to finish): ";
18    getline(cin, user_input);
19
20    while (user_input != "done") {
21        bool is_number = true;
22
23        for (char c : user_input) {
24            if (!isdigit(c)) {
25                is_number = false;
26                break;
27            }
28        }
29
30        if (is_number) {
31            int steps = stoi(user_input);
32            total_steps += steps;
33        } else {
34            cout << "Invalid input. Please enter a number or 'done'." << endl;
35        }
36
37        cout << "Enter steps taken (or type 'done' to finish): ";
38        getline(cin, user_input);
39    }
40
41    int steps_left = goal - total_steps;
42
43    cout << "\nTotal steps taken: " << total_steps << endl;
44    cout << "Steps left to reach your goal: " << steps_left << endl;
45    cout << "Keep moving and stay active!" << endl;
46
47    return 0;
48}