復習了一下輸入輸出、for和switch，做了一個ASCII碼轉換的小東西。

#include <iostream> #include <string>using namespace std;void numtoalfa(void); void alfatonum(void); void showthem(void);const int STARTOFASCII = 33; const int ENDOFASCII = 126; int main() {int k;cout << "ASCII碼轉換：" << endl;cout << "1：字符找碼" << endl;cout << "2：碼找字符" << endl;cout << "3：顯示全部" << endl;cout << "0：退出程序" << endl;cout << "輸入數字選擇對應功能：" << endl;cin >> k;while (k != 0){switch (k){case 1:alfatonum(); break;case 2:numtoalfa(); break;case 3:showthem(); break;default:cout << "輸入有誤！" << endl<<endl;}cout << "ASCII碼轉換：" << endl;cout << "1：字符找碼" << endl;cout << "2：碼找字符" << endl;cout << "3：顯示全部" << endl;cout << "0：退出程序" << endl;cout << "輸入數字選擇對應功能：" << endl;cin >> k;}cin.get(); }void alfatonum() {cout << "輸入需要轉換的字符（可連續輸入；輸入“quit”返回上一層）：" << endl;string ch;cin >> ch;while (ch != "quit"){int count = 0;int i;int q = ch.size();for (count = 0; count < q; count++){i = ch[count];cout << endl;cout << "\t“"<<ch[count]<<"” " << "的ASCII碼為：" << i << endl << endl;}cout << "輸入需要轉換的字符（可連續輸入；輸入“quit”返回上一層）：" << endl;cin >> ch;} }void numtoalfa() {cout << "輸入需要查找的ASCII碼（33-126為有效范圍）（輸入“0”返回上一層）：" << endl;int n;cin >> n;while (n != 0){if (n >= 33 && n<=126){char ch;ch = n;cout << endl;cout << "\tASCII碼" << n << "，對應的字符為：" << ch << endl << endl;cout << "輸入需要查找的ASCII碼（輸入“0”返回上一層）：" << endl;}elsecout << "\t輸入數字不在范圍內！" << endl << endl;cin>>n;} }void showthem() {cout << "選擇需要輸出的范圍：（輸入“0”返回上一層）" << endl;cout << "1：輸出數字（0-9）對應的ASCII碼" << endl;cout << "2：輸出大寫字母（A-Z）對應的ASCII碼" << endl;cout << "3：輸出小寫字母（a-z）對應的ASCII碼" << endl;cout << "4：輸出全部" << endl;int n;cin >> n;while (n != 0){cout << endl;switch (n){case 1:{int count;int count3 = 0;int shownumber;char ch = '0';for (count = 0; count < 10; count++, ch++){shownumber = ch;cout <<" “" <<ch<<"” " << "對應的ASCII碼為： " << shownumber << "\t";count3++;if (count3 == 3){count3 = 0;cout << endl;}}}; break;case 2:{int count;int count3 = 0;int shownumber;char ch = 'A';for (count = 1; count < 27; count++, ch++){shownumber = ch;cout << " “"<<ch <<"” " << "對應的ASCII碼為： " << shownumber << "\t";count3++;if (count3 == 3){count3 = 0;cout << endl;}}}; break;case 3:{int count;int shownumber;int count3 = 0;char ch = 'a';for (count = 1; count < 27; count++, ch++){shownumber = ch;cout <<" “"<< ch<<"” " << "對應的ASCII碼為： " << shownumber << "\t";count3++;if (count3 == 3){count3 = 0;cout << endl;}}}; break;case 4:{int shownumber;char ch;int count3 = 0;for (shownumber = STARTOFASCII; shownumber < ENDOFASCII + 1; shownumber++){ch = shownumber;cout <<" “"<< ch<<"” " << "對應的ASCII碼為： " << shownumber << "\t";count3++;if (count3 == 3){count3 = 0;cout << endl;}}}; break;default: cout << "輸入有誤！" << endl;}cout << endl<<endl;cout << "選擇需要輸出的范圍：（輸入“0”返回上一層）" << endl;cout << "1：輸出數字（1-9）" << endl;cout << "2：輸出大寫字母（A-Z）" << endl;cout << "3：輸出小寫字母（a-z）" << endl;cout << "4：輸出全部" << endl;cin >> n;} }

現在還稍微有一點點缺陷，就是在選擇數字找碼的時候，如果輸入字符，就死循環了，暫時還沒有啥好的解決辦法。

小程序地址：

ASCII碼轉換小程序-其它文檔類資源-CSDN下載

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