Java has indexof, is there anything like that in C for ints? for example if i have 233 i want to check if the first number 2 matches the last 3.
An array could be used of course and by putting the number inside it and comparing the first and third element, but is there a way without it?
Sure. Work out a way to extract the first and large digits. One way is to print the integer to a string (e.g. using itoa()), strip off any whitespace, and then compare the first digit printed with the last one. There are other ways (eg using value%10 to find the last digit, and dividing by 10 repeatedly to find the first).
thanks, value%10 seems to work fine but dividing by 10 works for 2 characters but it doesn't for 2 or greater numbers.
number entered: 12Code:int first; int stop = 1; if (stop == 1) { first = number/10; printf("\n%s", "FIRST "); printf("%d", first, "\n"); stop++; }
first number is: 1
number entered: 123
first number is: 12
I said divide by 10 repeatedly. What will the last non-zero result of doing that be?
hmm same result:
Code:int temp2 = 0; while (temp2 < number) { first = number/10; // number = number being entered printf("\n%s", "FIRST "); printf("%d", first, "\n"); temp2++; }
That's because your code isn't quite doing what I suggested....
i don't quiet understand, it is... you suggested that i divide by 10 repeatedly so i don't get what i'm doing wrong?
Divide by 10 until the result itself is less than 10 - then you have the first digit
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
Hmm where will the result come from and should i divide the number that's being entered or is it something else (just making sure im not doing the wrong thing)?
Use another variable man
Code:int last = mynumber % 10; int first = mynumber; while ( first > 10 ) { first = first / 10; }
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
ah so that was it. What was wrong with the variable name by the way?
Use any variable names you like, so long as it's a meaningful name in the context which you use it.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
