Convert decimal number in binary don't work with long long type

Question

This function not working for 4095.

long long convert(int decimalnum)
{
long long binarynum = 0;
int rem, temp = 1;

while (decimalnum!=0)
{
    rem = decimalnum%2;
    decimalnum = decimalnum / 2;
    binarynum = binarynum + rem*temp;
    temp = temp * 10;
}
return binarynum;
}

printf("%lld", convert(4095));

result is:-558038585

Is there a way to make the function work for this number?

Answer 1

Notice that temp will exceeds the range of possible values ​​for an integer number. You should fix your code as follows:

long long convert(int decimalnum)
{
    long long binaryNum = 0;
    long long temp = 1;
    int rem = 1;
    .
    .
    .
}