ACM基本輸入輸出(C++語言)

杭電ACM Steps

最近在短學期的任務下，我開始啦杭電的ACM Steps模塊。

其實在4月份左右做過一次ACM的基本輸入輸出，當時使用的全都是C語言，到現在基本都遺忘啦！

目錄

1,A+B for Input-Output Practice (I)
2,A+B for Input-Output Practice (II)
3,A+B for Input-Output Practice (III)
4,A+B for Input-Output Practice (IV)
5,A+B for Input-Output Practice (V)
6,A+B for Input-Output Practice (VI)
7,A+B for Input-Output Practice (VII)
8,A+B for Input-Output Practice (VIII)

如今使用C++確實比C語言更簡單，那麼今天進行總結一下吧！

(圖片是昨晚截的，奇怪的是這一串時間只有我一個在提交代碼，全部顯示的是本人提交代碼，真的是太難得！我就想截個圖紀念一下，哈哈哈哈！！！)

文章中代碼都已Accept

1. The input will consist of a series of pairs of integers a and b, separated by a space, one pair of integers per line.(連續輸入一對整數a和b)
A+B for Input-Output Practice (I)

#include <iostream>
using namespace std;
int main()
{
    int a, b;
    while(cin >> a >> b)
    {
        cout << a + b << endl;
    }
    return 0;
}

2. Input contains an integer N in the first line, and then N lines follow. Each line consists of a pair of integers a and b, separated by a space, one pair of integers per line.（先輸入N然後輸入N行的一對整數a和b）
A+B for Input-Output Practice (II)

#include <iostream>
using namespace std;
int main()
{
    int a, b;
    int n;
    cin >> n;
    while(n--){

        while(cin >> a >> b)
        {
            cout << a + b << endl;
        }
    }
    return 0;
}

3. Input contains multiple test cases. Each test case contains a pair of
integers a and b, one pair of integers per line. A test case containing 0 0 terminates the input and this test case is not to be processed.
(包含多個測試用例，每個測試用例包含一對整數a和b，只有一對整數都爲0，那麼終止測試)
A+B for Input-Output Practice (III)

#include <iostream>
using namespace std;
int main()
{
    int a, b;
    while(cin >> a >> b && (a || b))
    {
        cout << a + b << endl;
    }
    return 0;
}

4. Input contains multiple test cases. Each test case contains a integer N, and then N integers follow in the same line. A test case starting with 0 terminates the input and this test case is not to be processed.
(每個測試用例中先輸入N，然後輸入N個整數，一旦N爲0那麼終止輸入)
A+B for Input-Output Practice (IV)

#include <iostream>
using namespace std;
int main()
{
    int temp;
    int sum ;
    int n;
    while(cin >> n && n)
    {
        sum = 0;//這裏每次必須置爲0
        while(n--){
            cin >> temp;
            sum += temp;
        }
        cout << sum << endl;
    }
    return 0;
}

5. Input contains an integer N in the first line, and then N lines follow. Each line starts with a integer M, and then M integers follow in the same line.
（先輸入N代表需要輸入N個測試用例，在每個測試用例前先輸入M，接着輸入M個整數）
A+B for Input-Output Practice (V)

#include <iostream>
using namespace std;
int main()
{
    int temp;
    int sum ;
    int n, m;
    cin >> n;
    while(n--){
       cin >> m;
       sum = 0;
       while(m--)
       {
           cin >> temp;
           sum += temp;
       }
        cout << sum << endl;
    }
    return 0;
}

6. Input contains multiple test cases, and one case one line. Each case starts with an integer N, and then N integers follow in the same line.
（輸入多個測試用例，每組測試用例前輸入N，接着輸入N個整數）
A+B for Input-Output Practice (VI)

#include <iostream>
using namespace std;
int main()
{
    int temp;
    int sum ;
    int m;
   while(cin >> m)
   {
       sum = 0;
        while(m--)
       {
           cin >> temp;
           sum += temp;
       }
        cout << sum << endl;
    }
    return 0;
}

前六個基本輸入輸出基本包含所有的，無需死記硬背。看題目輸入的要求即可，重點是下面兩個的輸出去要求(格式的問題）

7. The input will consist of a series of pairs of integers a and b, separated by a space, one pair of integers per line.(輸入連續的測試用例，每個測試用例包含一對整數,輸入要求和1是一樣的）
For each pair of input integers a and b you should output the sum of a and b, and followed by a blank line(要求每輸出一個結果必須中間空一行)
A+B for Input-Output Practice (VII)

#include <iostream>
using namespace std;
int main()
{
    int a, b;
    while(cin >> a >> b)
    {
    //直接在原來基礎上cout << a + b << endl;增加一個endl
        cout << a + b << endl << endl;
    }
    return 0;
}

8. Input contains an integer N in the first line, and then N lines follow. Each line starts with a integer M, and then M integers follow in the same line.
（先輸入N，然後輸入N行測試用例，每個用例先輸入M,接着輸入M個整數，輸入要求和5是一眼的）
For each group of input integers you should output their sum in one line, and you must note that there is a blank line between outputs.
（輸出結果佔一行，而且連個結果之間需要空一行）

#include <iostream>
using namespace std;
int main()
{
    int temp;
    int sum ;
    int n, m;
    cin >> n;
    while(n--){
       cin >> m;
       sum = 0;
       while(m--)
       {
           cin >> temp;
           sum += temp;
       }
       if (n != 0)
        cout << sum << endl << endl;
        else
        cout << sum << endl;
        //注意點：
        /*
        if (n != 0)
        cout << sum << endl << endl;
        else
        cout << sum ;//會報Presentation Error
        */
        
        /*     
          cout << sum << endl << endl;
          //此情況也會報Presentation Error
        */
    }
    return 0;
}