How to use Char in Switch Case

Question

How to make this work

 #include <stdio.h>
    #include <conio.h>
    main()
    {
        char C;
        printf("R=This Program gives you some of the information of the country you entered.");
        printf("Enter a Country:");
        scanf("%c", &C);
        switch(C)
        {
            case 'Algeria':
                printf("Capital: Algiers");
                printf("Currency and Country Code: Algerian Dinar (DZD)");
                break;
            }   



        getch ();
        return 0;
    }

The Error is

• 11 8 C:\\Users\\Edrian\\Desktop\\C++ Codes\\World Information.cpp [Warning] character constant too long for its type

• C:\\Users\\Edrian\\Desktop\\C++ Codes\\World Information.cpp In function 'int main()':

• 11 8 C:\\Users\\Edrian\\Desktop\\C++ Codes\\World Information.cpp [Warning] case label value exceeds maximum value for
  type

Answer 1

Know the difference :

'Algeria' this is a string literal so it should be "Algeria" and your C should be a string

'A' is a character

Answer 2

Char 只包含一个字符，如果您想使用多个字符，则必须使用字符串数据类型。在您的情况下，您应该使用字符串

Answer 3

11 8 C:\\Users\\Edrian\\Desktop\\C++ Codes\\World Information.cpp [Warning] character constant too long for its type

This says that 'Algeria' is too long for the type char , which should be a single letter, eg 'A' (as suggested here ).

    char string[256];
    scanf("%255s", string);
    switch (s[0]) {
        case 'A':
            if (0 == strcmp(string, "Algeria")) {

This should work. You may need to #include <string.h> for strcmp .

Notice how "Algeria" is now double-quoted, while 'A' is single-quoted.

I elided out lines that would be the same in both, mostly printf statements. Make sure that you get the curly braces right. I added a { for the if . You'll need to add a } to match (before the break; ).

You could also say

if (!strcmp(string, "Algeria")) {

But I thought that it might be easier for you to read the other way. Functionally the two statements are the same, as C considers zero to be falsey.

See also:

• Read no more than size of string with scanf()
• What's the difference between these 4 items: character, array, string, literal in C?
• Does the C standard explicitly indicate truth value as 0 or 1?
• Why the switch statement cannot be applied on strings? (kudos to Yksisarvinen for finding )