帮帮忙看一下第四题，球球了

#include <iostream>
#include <string>
using namespace std;
int main()
{
    string s;
    int num[4] = {0};
    cout << "输入一行字符：";
    getline(cin, s);
    for (int i = 0; i < s.size() ; i++)
    {
        if ((s[i] >= 'A' && s[i] <= 'Z') || (s[i] >= 'a' && s[i] <= 'z'))
            num[0]++;
        else if (s[i] >= '0' && s[i] <= '9')
            num[1]++;
        else if (s[i] == ' ')
            num[2]++;
        else
            num[3]++;
    }
    cout << "英文字符个数是：" << num[0] << endl;
    cout << "数字字符个数是：" << num[1] << endl;
    cout << "空格字符个数是：" << num[2] << endl;
    cout << "其他字符个数是：" << num[3] << endl;
    return 0;
}

#include "stdafx.h"
 
 
int _tmain(int argc, _TCHAR* argv[])
{
    printf("请输入一行字符!\n");
    char Buf[WCHAR_MAX] = {'\0'};
    int ipos = -1;
    do
    {
        ipos++;
        scanf_s("%c", &Buf[ipos]);
 
    } while (Buf[ipos]!='\n');
 
    int iZiMu_KongGe_ShuZi_QiTa[4] = { 0 };
    for (int i = 0; i < ipos+1; i++)
    {
        if ((Buf[i] >= 'a' && Buf[i] <= 'z') || (Buf[i] >= 'A' && Buf[i] <= 'A'))// 字母
        {
            iZiMu_KongGe_ShuZi_QiTa[0]++;
        }
        else if (Buf[i]==' ')// 空格
        {
            iZiMu_KongGe_ShuZi_QiTa[1]++;
        }
        else if ((Buf[i] >= '0' && Buf[i] <= '9'))// 数字
        {
            iZiMu_KongGe_ShuZi_QiTa[2]++;
        }
        else// 其他
        {
            iZiMu_KongGe_ShuZi_QiTa[3]++;
        }
    }
 
    printf("输入为%s\n", Buf);
 
    printf("英文字母 %d个，空格 %d个，数字 %d个，其他%d个\n", 
        iZiMu_KongGe_ShuZi_QiTa[0], 
        iZiMu_KongGe_ShuZi_QiTa[1], 
        iZiMu_KongGe_ShuZi_QiTa[2],
        iZiMu_KongGe_ShuZi_QiTa[3] );
 
    _tsystem(L"pause");
    return 0;
}

#include <stdio.h>
#include <string.h>
int a = 0, b = 0, c = 0, d = 0;
void tjzf(char E[])
{
    int i = 0;
    for (i = 0; i <= strlen(E) - 1; i++)
    {
        if (E[i] >= 'A' && E[i] <= 'Z' || E[i] >= 'a' && E[i] <= 'z')
            a++;
        else if (E[i] >= '0' && E[i] <= '9')
            b++;
        else if (E[i] == ' ')
            c++;
        else
            d++;
    }
}
int main(void)
{
    char F[1000];
    printf("输入一段字符:");
    gets(F);
    tjzf(F);
    printf("英文字符个数是%d\n", a);
    printf("数字字符个数是%d\n", b);
    printf("空格字符个数是%d\n", c);
    printf("其他字符个数是%d\n", d);
    return 0;
}