help please !
i want to plus two strings .
i mean if i want to take large number like this 12344566677890565432333 in string
and take another number like this 239342498343094283049
i want to plus the two numbers .
how??
i mean if i want to take large number like this 12344566677890565432333 in string
and take another number like this 239342498343094283049
i want to plus the two numbers .
how??
Are you wanting to concatenate, or are you wanting the sum of these two numbers? If the former, use
http://www.cplusplus.com/reference/string/string/operator+=/
If the latter, you'll need to cast to a numeric type, add, and then store in a numeric type. You could probably do:
Your compiler might do an implicit cast for you, but it's safer to just do an explicit cast. Makes it more readable as well
http://www.cplusplus.com/reference/string/string/operator+=/
If the latter, you'll need to cast to a numeric type, add, and then store in a numeric type. You could probably do:
int sum = str1 + str2;Your compiler might do an implicit cast for you, but it's safer to just do an explicit cast. Makes it more readable as well
Be aware that your machine's unsigned int might top out at 4,294,967,295 if it's 32 bit, or 18,446,744,073,709,551,615 if it's 64 bit. Not enough for your values.
Hence why I suggest doing it as you would on paper (i.e. add the two values on the right, if the sum is greater than ten add one to a value to the left, now move on to the next two values etc etc).
Alternatively, use a bignum library.
Hence why I suggest doing it as you would on paper (i.e. add the two values on the right, if the sum is greater than ten add one to a value to the left, now move on to the next two values etc etc).
Alternatively, use a bignum library.
Last edited on
| Alternatively, use a bignum library. |
Or use a programming language that provides a bignum library itself.
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