How to compare two strings without case sensitivity?

Question

I have a code:

int main()
{
    printf("to exit the program type \"exit\":");
    char s[40];
    scanf("%s",s);
    if(strcmp(s,"exit")==0)
    {
        exit(0);
    }
    else
    {
        int n;
        printf("wrong");
    }
    return 0;
}

I want to when I enter "ExIt" it works. how can i change that?

score 1 · Answer 1 · answered Jul 15 '20 at 07:55

1

you can use tolower() in C, but it works for char, so maybe you need to itterate over s string and putting every char to lower case.

answered Jul 15 '20 at 07:55

walid barakat

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Without explaining the shortcomings this is *dangerous advice* because it fails for non-English alphabet languages. In general you **should not** implement case-insensitive comparison by converting the characters. Use a proper case-insensitive compare instead. – Konrad Rudolph Jul 15 '20 at 08:03
oh, you're right, i just thought the mate works on a simple code and maybe just a hint will be useful, but i hope he sees your comment – walid barakat Jul 15 '20 at 08:14

score -1 · Answer 2 · answered Jul 15 '20 at 07:54

-1

use stricmp instead of strcmp.

More letters to hit 30

answered Jul 15 '20 at 07:54

LoztInSpace

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2

`stricmp()` is not defined by the C Standard, or even POSIX – pmg Jul 15 '20 at 07:56
1

`stricmp` is a Visual Studio library. I don't think it's standard C. There's strcasecmp on Linux. – selbie Jul 15 '20 at 07:56
Haha - it's been 25 years + Didn't know that! – LoztInSpace Jul 15 '20 at 07:58

How to compare two strings without case sensitivity?

2 Answers2