前兩天有事情去了，沒有好好學，之后要補回來
9-1
main.cpp

#include <string.h> #include <iostream> #include"golf.h"const int GolfSize = 3; int main() {golf ann;setgolf(ann, "Ann Birdfree", 24);showgolf(ann);golf andy;setgolf(andy);golf g[GolfSize];int j = 0;for (int i = 0; i < GolfSize; i++){j = setgolf(g[i]);if (j == 1)showgolf(g[i]);else if (j == 0)break;}return 0; }

golf.h

const int Len = 40;struct golf {char fullname[Len];int handicap; }; void setgolf(golf& g, const char* name, int hc);int setgolf(golf& g);void handicap(golf& g, int hc);void showgolf(const golf& g);

golf.cpp

#include <string.h> #include <iostream> #include"golf.h"void setgolf(golf& g, const char* name, int hc) {strcpy_s(g.fullname, name);g.handicap = hc; }int setgolf(golf& g) {using std::cout;using std::cin;cout << "Please enter fullname: \n";cin.getline(g.fullname, 50);if (!strcmp(g.fullname, ""))return 0;cout << "Please enter handicap: \n";cin >> g.handicap;cin.get();return 1; } void handicap(golf& g, int hc) {g.handicap = hc; }void showgolf(const golf& g) {using std::cout;cout << "fullname: " << g.fullname << "\n";cout << "handicap: " << g.handicap << "\n"; }

9-2
需要用getline才能獲取空行

#include <iostream> #include<string> using namespace std;void strcount(const string str);int main() {string input;char next;cout << "Enter a line:\n";getline(cin, input);while (input != ""){strcount(input);cout << "Enter the next line (empty line to quit):\n";getline(cin, input);}cout << "Bye\n";return 0; }void strcount(const string str) {static int total = 0;int count = 0;cout << "\"" << str << "\" contains ";count = str.size();total += count;cout << count << " characters\n";cout << total << " characters total\n"; }

9-3
同樣需要stcpy_s
(1)

#include <iostream> #include <string>struct chaff {char dross[20];int slag; };int main() {using namespace std;chaff* cf = new chaff[2];strcpy_s(cf[0].dross, "gugugu");cf[0].slag = 6;strcpy_s(cf[1].dross, "biubiubiu");cf[1].slag = 9;for (int i = 0; i < 2; i++){cout << "dross, slag: " << cf[i].dross << ", " << cf[i].slag << endl;}//delete cf;<buffer>指定的是靜態內存，不需要用delete釋放return 0; }

(2)

#include <iostream> #include <string>struct chaff {char dross[20];int slag; }; const int BUF = 512; const int N = 2; char buffer[BUF];int main() {using namespace std;chaff* cf = new (buffer) chaff[N];strcpy_s(cf[0].dross, "gugugu");cf[0].slag = 6;strcpy_s(cf[1].dross, "biubiubiu");cf[1].slag = 9;for (int i = 0; i < 2; i++){cout << "dross, slag: " << cf[i].dross << ", " << cf[i].slag << endl;}//delete cf;<buffer>指定的是靜態內存，不需要用delete釋放return 0; }

9-4
main.cpp

#include <iostream> #include"Sales.h" using namespace SALES;int main() {Sales a, b;double arr[3] = { 1.1, 22, 4.4 };setSales(a, arr, 3);showSales(a);setSales(b);showSales(b);return 0; }

Sales.cpp

#include <iostream> #include"Sales.h" using namespace std;void SALES::setSales(Sales& s, const double ar[], int n) {double sum = 0;double max = ar[0];double min = ar[0];if (n < QUARTERS){for (int i = 0; i < n; i++){s.sales[i] = ar[i];sum += ar[i];if (max < ar[i])max = ar[i];else if (min > ar[i])min = ar[i];}s.average = sum / n;s.max = max;s.min = min;for (int i = n; i < QUARTERS; i++)s.sales[i] = 0;}elsecout << "too long\n"; } void SALES::setSales(Sales& s) {double sum = 0;cout << "Enter four numbers:\n";for (int i = 0; i < QUARTERS; i++){std::cin >> s.sales[i];}double max = s.sales[0];double min = s.sales[0];for (int i = 0; i < QUARTERS; i++){sum += s.sales[i];if (max < s.sales[i])max = s.sales[i];else if (min > s.sales[i])min = s.sales[i];}s.average = sum / QUARTERS;s.max = max;s.min = min; } void SALES::showSales(const Sales& s) {cout << "Sales" << "\n";cout << "Average: " << s.average << "\n";cout << "max: " << s.max << "\n";cout << "min: " << s.min << "\n"; }

Sales.h

#ifndef SALES_h_ #define SALES_h_ namespace SALES {const int QUARTERS = 4;struct Sales{double sales[QUARTERS];double average;double max;double min;};void setSales(Sales& s, const double ar[], int n);void setSales(Sales& s);void showSales(const Sales& s); } #endif 創作挑戰賽新人創作獎勵來咯，堅持創作打卡瓜分現金大獎

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