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man strtoul STRTOUL(3) Linux Programmer's Manual STRTOUL(3)NAME strtoul, strtoull - convert a string to an unsigned long integer.SYNOPSIS #include unsigned long int strtoul(const char *nptr, char **endptr, int base); unsigned long long int strtoull(const char *nptr, char **endptr, int base);DESCRIPTION The strtoul() function converts the initial part of the string in nptr to an unsigned long int..