C ++ review notes of from 0 to 1 (004)

A two-dimensional array, a nested loop, the console input and output

#include <iostream>
 a using  namespace std; 

/ * 
    Function: gold, silver and bronze medals total number of days statistics obtained row A country with a space separate 
     
    ideas: 
        1 digital capture console 
        2 receives a two-dimensional array of digital storage 
        3 silver and bronze medals calculated total number 
* / 
int main () { 
    
    int Row; // Row represents the number of days 
    
    CIN >> Row;
     // COUT << Row; 
    
    // int COL = 3;
     // int Medals [3] [. 3] = {{1,0,3}, {3,1,0}, {0,3,0}}; // Golds. 4 =, =. 4 Silvers, Bronzes. 3 =
     // int Medals [. 3] [. 3] = {3,2,3,3,2,3,3,2,3}; // Golds =. 9, Silvers =. 6, Bronzes. 9 = 
    
    int Medals [Row] [ . 3 ];
    
    char ch;
    if ((ch=getchar())=='\n') {
        char c;
        while((c=getchar())!='\n')
        {
            if(c>='0'&&c<='9')
            {
                ungetc(c,stdin);
                for(int k = 0;k < row;k++) {
                    for(int l = 0; l < 3;l++) {
                        cin>>medals[k][l];
                    }    
                }                
            }
        }
    }
    
    int i,j;
    int total;
    for(i = 0;i < 3;i++) { // 控制列 
     /*
        for(j = 0;j < 3;j++) {
            cout << medals[i][j] << " ";
            if(j / 2 == 1) {
                cout << endl;
            }
        }
     */
     
    //cout << i << endl;
        int sum = 0;
        for(j = 0;j < row;j++) { // 控制行 
            sum += medals[j][i];
            total += medals[j][i];            
        }    
        cout << sum << " ";    
    }
    /*
    int m,n;
    for (m = 0;m < 3;m++) {
        for(n = 0;n < 3;n++) {
            total += medals[m][n];
        }
    }
    */
    cout << total << endl;
    //cout << sum << endl;
    //total = golds + silvers + bronzes;
    //cout << golds << " " << silvers << " " << bronzes << " " << total << endl; 
    
    return 0;
}

Test Results: