Chapter VI -1- array of practice

/ * 
 * @Issue: keyboard input from a plurality of integers (not exceeding 50), which is in the range of 0 to 4, with the input end flag -1, count the number of the same integer 
 * @Author: scholar term 
 * @LastEditTime: 2020-01-18 10:55:28 
 * / 
#include <the iostream> 
the using namespace STD; 

int main () { 
    int A [50]; // used to store a plurality of integer 
    int num [5] = { 0,0,0,0,0}; // number to represent a value of 
    int T, I = 0; 
    the while (CIN >> T) { 
        IF (T == -. 1) BREAK; 
        a [++ I ] = T; 
    } 
    for (int J = 0; J <I; J ++) {// iterate the several number 
        NUM [A [J]] ++; 
    } 
    for (int J = 0; J <. 5; J ++) { 
        COUT << "NUM [" J << << "] =" << NUM [J] << endl; 
    } 
    return 0; 
}

　　

/*
 * @Issue: 若说明int a[2][3]={{1,2,3},{4,5,6}},将行和列的元素互换
 * @Author: 一届书生
 * @LastEditTime : 2020-01-18 11:01:46
 */

#include<iostream>
using namespace std;

int main(){
    int a[2][3]={{1,2,3},{4,5,6}};
    int b[3][2];
    for(int i=0;i<2;i++){
        for(int j=0;j<3;j++){
            b[j][i]=a[i][j];
        }
    }
    for(int i=0;i<3;i++){
    for(int j=0;j<2;j++)
    cout<<b[i][j]<<"\t";
    cout<<endl;
    }

    return 0;
}

　　

/ * 
 * @Issue: a defined integer array containing thirty elements, respectively, in order to impart an even number from 2 to begin, and in order to obtain a mean value for each of the five values 
 * and output on another array 
 * @ author: scholar term 
 * @LastEditTime: 2020-01-18 11:23:09 
 * / 
#include <the iostream> 
the using namespace STD; 

int main () { 
    int A [30], B [. 6] = {0,0 , 0,0,0,0}, SUM = 0; 
    for (int I = 2, J = 0; J <30; I + = 2) {// do to a array 
        a [J ++] = I; 
    } 
/ / I think he finally wanted to this method, each of the five takes, and 
    for (int I = 0; I <30/5; I ++) { 
        for (int. 5 J = I *; J <* I +. 5. 5; J ++) { 
            B [I] = A + [J]; 
        } 
    } 
    for (int I = 0; I <. 6; I ++) 
    COUT << B [I] /. 5 << endl; 
    return 0; 
}

　　

/ * 
 * @Issue: line-sequentially by the circulation of a 5 * 5 two-dimensional array forming a natural number of 1 to 25, and then outputs the lower-left triangular array 
 * @Author: next scholar 
 * @LastEditTime: 2020-01- 11:28:45 18 is 
 * / 
#include <the iostream> 
the using namespace STD; 

int main () { 
    int A [. 5] [. 5]; 
    for (int I = 0; I <. 5; I ++) 
    for (int = 0 J ; J <. 5; J ++) 
    CIN >> A [I] [J]; 
    for (int I = 0; I <. 5; I ++) { 
        for (int J = 0; J <= I; J ++) { 
            COUT << A [I] [J] << ""; 
        } 
        COUT << endl; 
    } 
    return 0; 
}