【c++ | 谭浩翔】第四章练习
2021/10/17 17:11:19
本文主要是介绍【c++ | 谭浩翔】第四章练习,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
【c++ | 谭浩翔】第四章练习
【p151 第九题】
#include <iostream> using namespace std; int main() { int y, d, a, b = 0, i; int m[11] = { 31,28,31,30,31,30,31,31,30,31,30 }; cout << "请输入年份:"; cin >> y; cout << "请输入月份:"; cin >> a; while (a > 12 || a < 1) //判断月份输入是否正确 { cout << "请输入正确的月份:"; cin >> a; } cout << "请输入日:"; cin >> d; if (a == 2) //判断日期输入是否正确 { if (y % 4 == 0 && y % 100 != 0) { m[2] = m[2] + 1; while (d > 29 || d < 1) { cout << "请输入正确的日期:"; cin >> d; } } else { while (d > 29 || d < 1) { cout << "请输入正确的日期:"; cin >> d; } } } else { if (a == 1 || a == 3 || a == 5 || a == 7 || a == 8 || a == 10 || a == 12) { while (d > 31 || d < 1) { cout << "请输入正确的日期:"; cin >> d; } } else { while (d > 30 || d < 1) { cout << "请输入正确的日期:"; cin >> d; } } } for (i = 0; i < a - 1; i++) //累计月份的天数 { b += m[i]; } d += b; cout << "该日是该年的第" << d << "天"; return 0; }
【p151 第十题】
#include <iostream> #include <string> using namespace std; int main() { char f[3][80]; int a = 0, b = 0, c = 0, d = 0, e = 0; for (int i = 0; i < 3; i++) { cout << "请输入第" << i + 1 <<"行文字:"; cin >> f[i]; for (int j = 0; j < 80 && f[i][j] != '\10' ; j++) { if (f[i][j] >= 'A' && f[i][j] <= 'Z') a++; else if (f[i][j] >= 'a' && f[i][j] <= 'z') b ++; else if (f[i][j] >= '0' && f[i][j] <= '9') c ++; else if (f[i][j] == ' ') d ++; else e++; } } cout << "共有:" << endl; cout << "英文大写字母:" << a << "个" << endl; cout << "英文小写字母:" << b << "个" << endl; cout << "数字:" << c << "个" << endl; cout << "空格:" << d << "个" << endl; cout << "其它字符:" << e << "个" << endl; return 0; } }
【P152 第十四题】
#include <iostream> #include <string> using namespace std; int main() { const int n = 5; int i, j; string str[n], temp; cout << "请输入n个字符串,将按字母由小到大排列输出:" << endl; for (i = 0; i < n; i++) cin >> str[i]; for (i = 0; i < n - 1; i++) { for (j = 0; j < n - i - 1; j++) { if (str[j] > str[j + 1]) { temp = str[j]; str[j] = str[j + 1]; str[j + 1] = temp; } } } cout << endl << "字母由小到大排列输出:" << endl; for (i = 0; i < n; i++) cout << str[i] << endl; return 0; }
【p152 第十五题】
#include <iostream> using namespace std; int main() { int i; const int n = 5; char str[n][99]; cout << "请输入需要判断的字符串" << "(共" << n << "个):" << endl; for (i = 0; i < n; i++) { cin >> str[i]; } cout << "以下是以字母A打头的字符串:" << endl; for (i = 0; i < n; i++) { if (str[i][0] == 'A') cout << str[i] << endl; } return 0; }
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