tolower() not working

Question

The below code snippet is used to convert a string to lower case.

int main()
{
    unsigned char s[] = \"AbS.d_\";

    tolower(s);
    printf(\"%s\\n\", s);

           


        

Answer 1

tolower takes int and return lowered int.

This should work:

int i=0;
for(i=0; s[i]; i++)
{
    s[i]=tolower(s[i]);
}

Answer 2

tolower takes a character type as parameter, but you use a string. You need to run through your array, and call tolower for each character.