[Solved] Finding out the maximum length of input number [closed]

    int c;
    int l=0;
    int maximum_length=-1;
    while ((c = getchar()) != EOF) {
        if (c != '\n') {
            l++;
        } else {
            if(maximum_length < l)
                maximum_length = l;
            l = 0;
        }
    }