Memory problem!!! URGENT~!

Hey guys, need some help here theres no errors and warning but when i run the program and in the customerinfomain i get a memory allocation error everytime i try to do a enquiry....... i got a function in that call handphoneinfomain that have the SAME logic as it and it does not have any problem....... could anyone help URGENT :confused:

In Line 466, you forgot to initialise the o variable to zero

Code:

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for(int o;o<Custinfomain::custlist;o++)
{
    cust_details[o].Enquirecustinfo(Nric);
}

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Hey thanx bro... i did it