c++ 实验二

#include<iostream>
using namespace std;
int main() {
    char n;
        cout<<"Menu:A(dd) D(elete) S(ort) Q(uit),select one:";
        cin>>n;
        if(n=='A'){
        cout<<"数据已经增加。";
        }
        else if(n=='D'){
        cout<<"数据已经删除。";
        }
        else if(n=='S'){
        cout<<"数据已经排序。";
        }
        else if(n=='Q'){
        exit （0）；
        }
    return 0;
}          

#include<iostream>
using namespace std;
int main() {
    char n;
    cout << "Menu:A(dd) D(elete) S(ort) Q(uit),select one:";
    cin >> n;
    switch(n){
    case'A':
        cout << "数据已经增加。";
        break;
    case'D':
        cout << "数据已经删除。";
        break;
    case'S':
        cout << "数据已经排序。";
        break;
    case'Q':
        break;
    }
    return 0;
}

#include<iostream>
using namespace std;
int main() {
    int n = 1,i = 0, j = 1;
    while (n <= 100) {
        i = 0;
        j = 1;//复位
        while (j < n)
        {
            if (n%j == 0)
                i++;
            j++;
        }
        if (i == 1)
            cout << n << endl;
        n++;
    }
    return 0;
}

#include<iostream>
using namespace std;
int main() {
    int n = 1,i = 0, j = 1;
    do {
        i = 0;
        j = 1;//复位
        do {
            if (n%j == 0)
                i++;
            j++;
        } while (j < n);
        if (i == 1)
            cout << n << endl;
        n++;
    } while (n <= 100);
    return 0;
}

#include<iostream>
using namespace std;
int main() {
    int n, i = 0,j;
    for (n = 1; n <= 100; n++) {
        i = 0;//复位
        for (j = 1; j < n; j++)
            if (n%j == 0)
                i++;
        if (i == 1)
            cout << n << endl;
    }
    return 0;
}

#include<iostream>
#include<cstdlib>
using namespace std;
int main() {
    int n,answer,i,t=1;
    cout << "输入一个随机数字开始游戏：" << endl;
    cin >>i ;
    srand(i);
    answer = rand() % 100;
    while(t=1){
        cout << "输入一个1-100间的数字：" << endl;
        cin >> n;
        if (n < answer) {
            cout << "你猜的太小了。" << endl;
            continue;
        }
        if (n > answer) {
            cout << "你猜的太大了。" << endl;
            continue;
        }
        if (n = answer) {
            cout << "恭喜你答对了。";
            break;
        }
    }
    system("pause");//为了截个图加的-_-
    return 0;
}

#include<iostream>
#include<cstdlib>
using namespace std;
int main() {
    int n,answer,i,t=1;
    cout << "输入一个随机数字开始游戏：" << endl;
    cin >>i ;
    srand(i);
    answer = rand() % 100;
    do{
        cout << "输入一个1-100间的数字：" << endl;
        cin >> n;
        if (n < answer) {
            cout << "你猜的太小了。" << endl;
            continue;
        }
        if (n > answer) {
            cout << "你猜的太大了。" << endl;
            continue;
        }
        if (n = answer) {
            cout << "恭喜你答对了。";
            break;
        }
    }while (t = 1);
    system("pause");//为了截个图加的-_-
    return 0;
}

#include<iostream>
using namespace std;
int main() {
    int i, j, k,num=0;
    char color[5][7] = { "Red","Yellow","Blue","White","Black" };
    for(i=0;i<=5;i++){
        for (j = i+1; j < 5; j++) {
            for (k = j+1; k < 5; k++) {
                if (i != j && i != k && j != k)
                    num++;
            }
        }
    }
    cout << num;
    system("pause");
    return 0;
}