I need to write in C++ a complete boolean function that will take an integer array and it's maximum size as a parameter and return whether or not that array has any elements with a value of 0.
I'm not even sure where to start.
Thanks in advance.
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7 Answers
bool checkFunction(int *myArray, int size)
{
for (int i=0; i < size; ++i)
{
if (myArray[i] == 0)
return true;
}
return false;
}
Are you talking about something like this? This will iterate through the array and return true if there is a value of 0 anywhere.
Comments
Use std::find
#include <algorithm>
bool ContainsZero(int *arr, int size)
{
return std::find(arr, arr+size, 0) != (arr+size);
}
Comments
How about reading a tutorial on arrays in C++?
answered Apr 26, 2011 at 18:46
Kornel Kisielewicz
58.1k15 gold badges114 silver badges149 bronze badges
Comments
bool TestForZero(int* myArray, int maxSize)
{
for(int ii=0; ii<maxSize; ++ii)
if(myArray[ii] == 0)
return true;
return false;
}
1 Comment
Jess
I had try catch in there because technically, the OP asked to pass a 'maximum' (not actual) size. My implementation was wrong, so I took it out.
This sounds an awful lot like a homework problem, so I'll just give you the concepts and let you learn.
You need to use a "for" loop, check the value of each item in the array, and return true if you find one, otherwise return false after the loop exits.
3 Comments
lostandlearning
Yes, I'm doing homework. Is that ok to questions like this here? I'm a newb to the site and any unwritten rules.
Tyler Ferraro
Homework questions are perfectly fine as long as you've done your research, are asking questions to understand your homework and not just have your homework done for you.
djdanlib
Indeed. Like many other communities of coders out there, we are here to help you learn, not solve your problems for free. So if you wish to learn, you will really enjoy this website. Good luck in your learning, hope you keep it up!
bool hasZeroes(int * array, int len) {
int zeroCount = 0;
for (int i = 0; i < len; i++) {
if (array[i] == 0) zeroCount++;
}
return zeroCount > 0;
}
Comments
bool foo(int* array, int size)
{
int i;
for (i = 0; i < size; i++)
{
if (array[i] == 0)
{
return true;
}
}
return false;
}
and to call it you would do something like:
int arr[] = { 1, 2, 3, 4, 0, 6};
foo(arr, 6);
