C programming: How to check whether the input string contains combination of uppercase and lowercase

Question

I\'m totally newbie here. As stated above, I would like to know how to check whether the input string contains combination of uppercase and lowercase. After that print a stateme

Answer 1

Something like this (which will work on both ASCII and EBCDIC platforms):

#include 

int hasMixedCase(const char *src)
{
    int hasUpper=0, hasLower=0;
    for (;*src && !(hasUpper && hasLower);++src)
    {
        hasUpper = hasUpper || (isalpha(*src) && *src == toupper(*src));
        hasLower = hasLower || (isalpha(*src) && *src == tolower(*src));
    }
    return hasLower && hasUpper;
}