Code::blocks 中的代码在 Visual Studio 2013 中不起作用

Question

这是我的代码:

// SysProAss1.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <stdio.h>
#include <ctype.h>


int _tmain(int argc, _TCHAR* argv[])
{
    {

    char line[20];

    //Asking the User to input some characters to use in the program
    printf("Enter a few characters please:\n");
    scanf_s("%s", line);

    //For loop to print each character of the string on a new line
    for (int i = 0; line[i]; ++i)
        {
        // If statement to check whether the character is an upper case vowel
        if (line[i] == 'A' || line[i] == 'E' || line[i] == 'I' || line[i] == 'O' || line[i] == 'U')
            printf("%c is an upper case vowel.\n", line[i]);

            // If statement to check whether the character is a lower case vowel
        else if (line[i] == 'a' || line[i] == 'e' || line[i] == 'i' || line[i] == 'o' || line[i] == 'u')
            printf("%c is a lower case vowel.\n", line[i]);

            // ispunct() function used to check whether the input character is a punctuation
            else if (ispunct(line[i]))
                printf("%c is a punctuation character. \n", line[i]);

                // Else statement to print the character if it does not fit the above if statements
                else 
                printf("%c\n", line[i]);

    }

}

}

代码将编译，但当我输入字符时，不会打印任何内容。我已经测试过输入一些字符后字符串是否包含任何内容，但事实并非如此。如有任何帮助，我们将不胜感激

Answer 1

将代码中的 scanf_s 语句更改为 scanf_s("%s", line, sizeof(line));