C++程式設計(第二版)譚浩強----程式題課後習題答案第三章
阿新 • • 發佈：2019-01-22
2.
#define _USE_MATH_DEFINES #include <iostream> #include <iomanip> #include <cmath> using namespace std; int main() { float r, h, l, S, S1, V, V1; cin >> r >> h; l = 2 * M_PI * r; S = M_PI * r * r; S1 = 4 * M_PI * r * r; V = 4 / 3 * M_PI * r * r * r; V1= S * h; cout << setiosflags(ios::fixed) << setprecision(2); cout << "圓周長 l = " << l << '\t' << "圓面積 S = " << S << endl; cout << "圓球表面積 S1 = " << S1 << '\t' << "圓球體積 V = " << V << endl; cout << "圓柱體積 V1 = " << V1 << endl; return 0; }
結果：
3.
#include <iostream> #include <iomanip> using namespace std; int main() { float F, c; cout << "華氏溫度 F = "; cin >> F; cout << setiosflags(ios::fixed) << setprecision(2); c = (5.0 / 9.0) * (F - 32); cout << "攝氏溫度c = " << c << endl; return 0; }
結果：
4.
c1,c2定義為字元型
#include <iostream> using namespace std; int main() { char c1, c2; cout << "請輸入兩個字元"; c1 = getchar(); c2 = getchar(); cout << "putchar 輸出結果"; putchar(c1); putchar('\t'); putchar(c2); putchar('\n'); cout << "cout輸出結果"; cout << c1 << '\t' << c2 << endl; return 0; }
結果：
c1,c2定義為整形
#include <iostream> using namespace std; int main() { int c1, c2; cout << "請輸入兩個字元"; c1 = getchar(); c2 = getchar(); cout << "putchar 輸出結果"; putchar(c1); putchar('\t'); putchar(c2); putchar('\n'); cout << "cout輸出結果"; cout << c1 << '\t' << c2 << endl; return 0; }
結果：
定義為整形即可輸出ASCII碼。
8.
0
1
1
0
1
9.
#include <iostream> using namespace std; int main() { int compare(int x, int y, int z); int a, b, c, temp, max; cout << "輸入三個整數a b c" << endl; cin >> a >> b >> c; //第一種方法 /*if ((a > b) && (a > c)) cout << "最大的數為a = " << a << endl; else if((b>a)&&(b>c)) cout << "最大的數為b = " << b << endl; else cout << "最大的數為c = " << c << endl;*/ //第二種方法 /*if(a<b) if(b<c) cout << "最大的數為c = " << c << endl; else cout << "最大的數為b = " << b << endl; else if(a<c) cout << "最大的數為c = " << c << endl; else cout << "最大的數為a = " << a << endl;*/ //第三種方法 /*temp = (a > b) ? a : b; max = (temp > c) ? temp : c; cout << "最大的數為 " << max << endl;*/ max = compare(a, b, c); cout << "最大的數為 " << max << endl; return 0; } int compare(int x, int y, int z) { int temp, max; temp = (x > y) ? x : y; max = (temp > z) ? temp : z; return max; }
結果：
10.
#include <iostream> using namespace std; int main() { int x, y; cout << "輸入 x = "; cin >> x; if (x < 1) y = x; else if (x >= 1 && x < 10) y = 2 * x - 1; else y = 3 * x - 11; cout << "輸出 y = " << y << endl; return 0;
結果：
11.
#include <iostream> using namespace std; int main() { int grade; while (1) { cout << "輸入學生成績grade = "; cin >> grade; if (grade < 0 || grade > 100) cout << "成績輸入錯誤,請重新輸入！" << endl; else switch ((int)grade / 10) { case 10: cout << grade << "分成績等級為A" << endl; break; case 9: cout << grade << "分成績等級為A" << endl; break; case 8: cout << grade << "分成績等級為B" << endl; break; case 7: cout << grade << "分成績等級為C" << endl; break; case 6: cout << grade << "分成績等級為D" << endl; break; default: cout << grade << "分成績等級為E" << endl; break; } } return 0; }
結果：
12.
#include <iostream> using namespace std; int main() { long int a; cout << "輸入正整數 a = "; while (1) { cin >> a; if (a > 99999) { cout << "輸入錯誤,請重新輸入！" << endl; continue; } else if (a / 10000 > 0) cout << "a 為5位數 " << a / 10000 + (a % 10000) / 1000 * 10 + (a % 1000) / 100 * 100 + (a % 100) / 10 * 1000 + (a % 10) * 10000 << endl; else if (a / 1000 > 0) cout << "a 為4位數 " << a / 1000 + (a % 1000) / 100 * 10 + (a % 100) / 10 * 100 + (a % 10) * 1000 << endl; else if (a / 100 > 0) cout << "a 為3位數 " << a / 100 + (a % 100) / 10 * 10 + (a % 10) * 100 << endl; else if (a / 10 > 0) cout << "a 為2位數 " << a / 10 + (a % 10) * 10 << endl; else cout << "a 為1位數 " << a << endl; } return 0; }
結果：
13.
#include<iostream> using namespace std; int main() { float i; int c; while (1) { /*cout << "輸入當月利潤為 i = "; cin >> i; if (i <= 10) cout << "應發獎金為 " << i*0.1 << "萬元" << endl; else if (i <= 20 && i >= 10) cout << "應發獎金為 " << 10 * 0.1 + (i - 10)*0.075 << "萬元" << endl; else if (i <= 40 && i >= 20) cout << "應發獎金為 " << 10 * 0.1 + 10 * 0.075 + (i - 20)*0.05 << "萬元" << endl; else if (i <= 60 && i >= 40) cout << "應發獎金為 " << 10 * 0.1 + 10 * 0.075 + 20 * 0.05 + (i - 40)*0.03 << "萬元" << endl; else if (i <= 100 && i >= 60) cout << "應發獎金為 " << 10 * 0.1 + 10 * 0.075 + 20 * 0.05 + 20 * 0.03 + (i - 60)*0.015 << "萬元" << endl; else cout << "應發獎金為 " << 10 * 0.1 + 10 * 0.075 + 20 * 0.05 + 20 * 0.03 + 40 * 0.015 + (i - 100)*0.01 << "萬元" << endl;*/ cout << "輸入當月利潤為 i = "; cin >> i; c = i / 10; if (c > 10) c = 10; switch (c) { case 0: cout << "應發獎金為 " << i*0.1 << "萬元" << endl; break; case 1: cout << "應發獎金為 " << 10 * 0.1 + (i - 10)*0.075 << "萬元" << endl; break; case 2: case 3: cout << "應發獎金為 " << 10 * 0.1 + 10 * 0.075 + (i - 20)*0.05 << "萬元" << endl; break; case 4: case 5: cout << "應發獎金為 " << 10 * 0.1 + 10 * 0.075 + 20 * 0.05 + (i - 40)*0.03 << "萬元" << endl; break; case 6: case 7: case 8: case 9: cout << "應發獎金為 " << 10 * 0.1 + 10 * 0.075 + 20 * 0.05 + 20 * 0.03 + (i - 60)*0.015 << "萬元" << endl; break; case 10: cout << "應發獎金為 " << 10 * 0.1 + 10 * 0.075 + 20 * 0.05 + 20 * 0.03 + 40 * 0.015 + (i - 100)*0.01 << "萬元" << endl; break; } } return 0;
結果：
14.
#include<iostream> using namespace std; int main() { void sort(int m, int j, int k, int l); int a, b, c, d; cout << "請輸入四個整數 "; cin >> a >> b >> c >> d; sort(a, b, c, d); return 0; } void sort(int m, int j, int k, int l) { int temp; if (m > j) { temp = m; m = j; j = temp; } if (m > k) { temp = m; m = k; k = temp; } if (m > l) { temp = m; m = l; l = temp; } if (j > k) { temp = j; j = k; k = temp; } if (j > l) { temp = j; j = l; l = temp; } if (k > l) { temp = k; k = l; l = temp; } cout << "從小到大順序輸出為：" << m << '\t' << j << '\t' << k << '\t' << l << '\t' << endl; }
結果：
15.
#include<iostream> using namespace std; int main() { int m, n, temp, p; while (1) { temp = 1; cout << "請輸入兩個正整數："; cin >> m >> n; p = m * n; while (temp != 0) { if (m > n) { temp = m % n; m = n; n = temp; if (temp == 0) { cout << "m 和 n 的最大公約數為：" << m << endl; cout << "m 和 n 的最小公倍數為：" << p / m << endl; } } else { temp = n % m; n = m; m = temp; if (temp == 0) { cout << "m 和 n 的最大公約數為：" << n << endl; cout << "m 和 n 的最小公倍數為：" << p / n << endl; } } } } return 0; }
結果：
16.
#include <iostream> using namespace std; int main() { char c; int l = 0, s = 0, d = 0, o = 0; cout << "請輸入一行字元" << endl; while (1) { while ((c = getchar()) != '\n') { if (c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z') l++; else if (c == ' ') s++; else if (c >= '0' && c <= '9') d++; else