i want to make frequency counter using LCD

please help me in making frequency counter ccp module.
please give me ideas..

i ahve short time to complete it please..

char *freq = "00000.00";    //what is meant by it..

freq[0] = (freq2write/10000000) + 48;
freq[1] = (freq2write/1000000)%10 + 48; what is mean by these commands...
freq[2] = (freq2write/100000)%10 + 48;
freq[3] = (freq2write/10000)%10 + 48;

is basically conversion of freq2write from integer to ascii which is stored in freq array.
48 is ascii code of digit '0'. whatever digit you get by dividing and taking mod is then added to 48 to get ascii character of that digit. e.g. 4 + 48 gives you ascii value of digit '4'