CODEWITHSUNDEEP
cwhile-loopswitch-statement
Eran Amsellem
Eran Amsellem

Reputation: 11

Code fails at case '0' - I don't understand why

Here is a minimal form of the code emphasizing the issue I have. Code fails at "exit"(case '0') - program simply crashes. I suspect it is related to the while loop. The issue occurs no matter what character i choose for the exit case (instead of '0'). 

#include <stdio.h>

void main()
{
    int run=1;
    char menu_option; 

    while (run==1) 
    {
        printf("Choose case:\n");
        scanf ("%s", &menu_option);
        switch (menu_option) {
        case '1':
        printf("1");
        break;

        case '2':
        printf("2");
        break;

        case '0':
        run=0;
        break;

        default:
        printf("Wrong input, try again\n");

        }
    }
}

Upvotes: 0

Views: 67

Answers (1)

Clifford
Clifford

Reputation: 93564

menu_option is not a string, so %s is the wrong format specifier. You need %c, prefixed with a space to prevent whitespace (including newline) being interpreted as valid character input.

    scanf (" %c", &menu_option);

Upvotes: 2

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