第二周实验报告

#include <iostream> 

 

using namespace std; 

 

void d2d (int n); 

 

int main (void) 

{ 

    int a; 

 

    cin >> a; 

 

    d2d (a); 

 

    cout << endl; 

 

    return 0; 

} 

 

void d2d (int n) 

{ 

    if (n == 0) 

    { 

cout << 0;

    } 

    else if (n == 1) 

    { 

        cout << 1; 

    } 

    else  

    { 

        d2d (n / 2); 

 

        cout << n % 2; 

    } 

} 

#include <iostream> 

 

using namespace std; 

 

long fac (int n); 

 

int main (void) 

{ 

    int m, n;  

 

cin >> m >> n;

 

    cout << fac (m) / fac (n) / fac (m - n) << endl; 

 

    return 0; 

} 

 

long fac (int n) 

{ 

    int s; 

 

    if (n == 1) 

    { 

        return 1; 

    } 

    else  

    { 

        s = n * fac (n - 1); 

    } 

    return s; 

} 

//编程序输入m,n,输出组合数,要求用自定义函数求阶乘。#include <iostream>using namespace std;long fac (int n); //求n的阶乘int main (void){int m, n; //存储组合数的上限下限cin >> m >> n;cout << fac (m) / fac (n) / fac (m - n) << endl;return 0;}long fac (int n){int s;if (n == 1){return 1;}else {s = n * fac (n - 1);}return s;}

#include <iostream> 

 

#include <string.h> 

 

using namespace std; 

 

int main (void) 

{ 

    char input [50]; 

 

    gets(input); 

 

    int num = 1;  

    for (int i = 1; i < 50; ++i) 

    { 

        if ((input [i - 1] !=' ') && (input [i] == ' ')) 

        { 

            ++num; 

        } 

    } 

    cout << "There are " << num <<" words in the line." << endl; 

 

    return 0; 

} 

#include <iostream> 

 

#include <string.h> 

 

using namespace std; 

 

int main (void) 

{ 

    char input [50]; 

     

    char cpyinput [50]; 

     

    gets (input); 

     

    int c = 0;   

     

    for (int i = 0, j = 0; i < 50; ++i) 

    { 

        if (input [i] !=' ' && input [i] != '\0') 

        { 

            c = 1; 

        } 

         

        if (c == 1) 

        { 

            cpyinput [j] = input [i]; 

             

            if (input [i] == '.' || input [i] == '!' || input [i] ==',' || input [i] == ';' || input [i] =='?') 

            { 

                cpyinput [j + 1] = ' '; 

                 

                ++j; 

 

                if (input [i + 1] ==' ') 

                { 

                    ++i; 

                } 

            } 

             

            ++j; 

        } 

         

        if (input [i] ==' ') 

        { 

            c = 0; 

        } 

    } 

     

    cout << cpyinput << endl; 

 

    return 0; 

} 

//输出规范的文本#include <iostream>#include <string.h>using namespace std;int main (void){char input [50];char cpyinput [50];gets (input);int c = 0; //区分单词与空格for (int i = 0, j = 0; i < 50; ++i){if (input [i] != ' ' && input [i] != '\0'){c = 1;}if (c == 1){cpyinput [j] = input [i]; if (input [i] == '.' || input [i] == '!' || input [i] == ',' || input [i] == ';' || input [i] == '?'){cpyinput [j + 1] = ' ';++j;if (input [i + 1] == ' '){++i;}}++j;}if (input [i] == ' '){c = 0;}}cout << cpyinput << endl;return 0;}