根据其他变量格式化字符串

Question

为课程分配工作，要求我们提供输入，以便我们创建一个＆＃34;畜栏＆＃34;基于输入的数字。我真的很难在基于另一个变量尝试获得正确的间距。畜栏应该看起来像：

|==|==|==|
:        :
-        -
:        :
|==|==|==|

我的问题是中心的空白区域（应该基于顶部/底部的长度）。 Setw（）在某种程度上起作用，但同样，只是一个令人愤怒的时间。以下是我到目前为止的其余部分：`

#include <iostream>
#include <iomanip>
using namespace std;

main () {

    int theloop,nsfp,ewfp,count,nsfp2,ewfp2,nsfpw,count2;
    char choice;
    theloop = 0;

    while (theloop < 1) {

        do { 
            cout << "How many North/South Fence posts? ";
            cin >> nsfp;
            if (nsfp < 2)
            cout << "Value must be at least 2, please try again\n";
            else if (nsfp > 10)
                nsfp = 10;
        } while (nsfp < 2);

        do { 
            cout << "How many East/West Fence posts? ";
            cin >> ewfp;
            if (ewfp < 2)
                cout << "Value must be at least 2, please try again\n";
            else if (ewfp > 10)
                nsfp = 10;
        } while (ewfp < 2);

        for (count = 1; count <= nsfp; count++) {
            cout << "|";
            nsfp2 = nsfp - 1;
            for (count = 1; count <= nsfp2; count++) {
                cout << "==|";
                nsfpw = count;
            }
        }

        for (count = 1; count < ewfp; count++) {
            cout << "\n:" << " " << ":" << endl;
            ewfp2 = ewfp;
            for (count = 1; count < ewfp2; count++){
                cout << "-" << setw(nsfpw) << "-" << "\n:" << ":" << endl;
            }   
        }

        cout << "\n" << nsfp << endl;
        cout << ewfp;
        theloop = 1;
    }
}

Answer 1

也许您正在寻找的是这个。空格的数量是

  

3 * nsfp - 4;

#include <iostream>
#include <iomanip>
using namespace std;

main () {

    int theloop,nsfp,ewfp,count,nsfp2,ewfp2,nsfpw,count2;
    char choice;
    theloop = 0;

    while (theloop < 1) {

    do { 
    cout << "How many North/South Fence posts? ";
    cin >> nsfp;
    if (nsfp < 2)
        cout << "Value must be at least 2, please try again\n";
    else if (nsfp > 10)
        nsfp = 10;
    } while (nsfp < 2);

    do { 
    cout << "How many East/West Fence posts? ";
    cin >> ewfp;
    if (ewfp < 2)
        cout << "Value must be at least 2, please try again\n";
    else if (ewfp > 10)
        nsfp = 10;
    } while (ewfp < 2);

    for (count = 1; count <= nsfp; count++) {
        cout << "|";
        nsfp2 = nsfp - 1;
        for (count = 1; count <= nsfp2; count++) {
            cout << "==|";
            nsfpw = count;
        }
    }
    cout << "\n";
    int spaces = 3 * nsfp - 4;
    for (count = 1; count < ewfp; count++) {
        cout << ":";
        for (int i = 0; i < spaces; i++) {
            cout << " ";
        }
        cout << ":\n-";
        ewfp2 = ewfp;
        for (int i = 0; i < spaces; i++){
            cout << " ";
        }
        cout << "-\n";   
    }
    for (count = 1; count <= nsfp; count++) {
        cout << "|";
        nsfp2 = nsfp - 1;
        for (count = 1; count <= nsfp2; count++) {
            cout << "==|";
            nsfpw = count;
        }
    }

    cout << "\n" << nsfp << endl;
    cout << ewfp;
    theloop = 1;
    }
}

更简洁的方法：

#include <iostream>
#include <iomanip>
#include <string>
using namespace std;

main () {

    int theloop,nsfp,ewfp,count,nsfp2,ewfp2,nsfpw,count2;
    char choice;
    theloop = 0;

    while (theloop < 1) {

    do { 
    cout << "How many North/South Fence posts? ";
    cin >> nsfp;
    if (nsfp < 2)
        cout << "Value must be at least 2, please try again\n";
    else if (nsfp > 10)
        nsfp = 10;
    } while (nsfp < 2);

    do { 
    cout << "How many East/West Fence posts? ";
    cin >> ewfp;
    if (ewfp < 2)
        cout << "Value must be at least 2, please try again\n";
    else if (ewfp > 10)
        nsfp = 10;
    } while (ewfp < 2);

    for (count = 1; count <= nsfp; count++) {
        cout << "|";
        nsfp2 = nsfp - 1;
        for (count = 1; count <= nsfp2; count++) {
            cout << "==|";
            nsfpw = count;
        }
    }
    cout << "\n";
    string spaces(3 * nsfp - 4, ' ');
    for (count = 1; count < ewfp; count++) {
        cout << ":" << spaces << ":\n";
        cout << "-" << spaces << "-\n";
    }
    for (count = 1; count <= nsfp; count++) {
        cout << "|";
        nsfp2 = nsfp - 1;
        for (count = 1; count <= nsfp2; count++) {
            cout << "==|";
            nsfpw = count;
        }
    }

    cout << "\n" << nsfp << endl;
    cout << ewfp;
    theloop = 1;
    }
}