plz explain these function. how can w divide a number by 3 using only atoi function.
sydsine 0 Newbie Poster
Ancient Dragon 5,243 Achieved Level 70 Team Colleague Featured Poster
you can't. atoi() converts a string into an integer, has nothing to do with division.
cse.avinash -1 Junior Poster
Yup as told by Ancient Dragon, atoi()converts a string into an integer and atof->string to float.
Are you trying to do this:--;)
#include<stdio.h>
int main(void)
{
char a[]="90";
int c;
c=atoi(a)/3;
printf("%d",c);
return 0;
} sydsine 0 Newbie Poster
No. Division by three without using modulo, division operator . Use of only atoi is permitted
Ancient Dragon 5,243 Achieved Level 70 Team Colleague Featured Poster
After converting the string to int using atoi() you can simulate division by a series of subtraction.
cse.avinash -1 Junior Poster
addition of digits of number if divisible by 3 then that number is divisible by 3.
396=3+9+6=18=1+8=9.
1)store 3,6,9 using enum.
2)sum=0
3)input a string a.
4)convert each char into digit using atoi.
5)add that char to sum and store it in sum.
6)assign sum to a.
repeat this process untill you get a single character.
7)check with 3,6,9 if equals then divisible, else not..
I think this will work out.
WaltP 2,905 Posting Sage w/ dash of thyme Team Colleague
addition of digits of number if divisible by 3 then that number is divisible by 3.
396=3+9+6=18=1+8=9.
1)store 3,6,9 using enum.
2)sum=0
3)input a string a.
4)convert each char into digit using atoi.
5)add that char to sum and store it in sum.
6)assign sum to a.
repeat this process untill you get a single character.
7)check with 3,6,9 if equals then divisible, else not..I think this will work out.
No it won't.
A) In order to "4)convert each char into digit using atoi." you need to convert each character into a string first. The overhead for that is huge compared to char - '0' .
B) Then you "6)assign sum to a." But sum is an integer and a is a string. How do you assign an integer to a string?
If you truly think it will work, please post your working code. I'd love to see it...
cse.avinash -1 Junior Poster
No it won't.
I think it will because sum of digits of a number if divisible by 3 then that original number is divisible by 3.
If you have some examples making this wrong then please show me.
you need to convert each character into a string first.
yep it's my mistake as atoi is for conversion of strings into number not a character.
If you truly think it will work
Ummm..let me think a bit more about it and sure i will also love to post the code if I am done with it.
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