C++ Exercises: Move all negative elements of an array of integers to the end of the array without changing the order of positive element and negative element
C++ Array: Exercise-18 with Solution
Write a C++ program to move all negative elements of an array of integers to the end of the array without changing the order of positive element and negative element.
Sample Solution:
C++ Code :
#include <iostream>
using namespace std;
void segregateElements(int nums[], int n)
{
// Array to store result
int result[n];
int j = 0; // index of result
for (int i = 0; i < n ; i++)
if (nums[i] >= 0 )
result[j++] = nums[i];
if (j == n || j == 0)
return;
for (int i = 0 ; i < n ; i++)
if (nums[i] < 0)
result[j++] = nums[i];
// Copy contents to nums[]
memcpy(nums, result, sizeof(result));
}
int main()
{
int nums[] = {0, 9, -7, 2, -12, 11, -20};
int n = sizeof(nums)/sizeof(nums[0]);
cout << "Original array: ";
for (int i=0; i < n; i++)
cout << nums[i] <<" ";
segregateElements(nums, n);
printf("\nArray elements after rearrange: ");
for (int i=0; i < n; i++)
cout << nums[i] <<" ";
return 0;
}
Sample Output:
Original array: 0 9 -7 2 -12 11 -20 Array elements after rearrange: 0 9 2 11 -7 -12 -20
Flowchart:

C++ Code Editor:
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Previous: Write a C++ program to sort (in descending order) an array in of distinct elements according to absolute difference of array elements and with a given value.
Next: Write a C++ program to find a number which occurs odd number of times of a given array of positive integers. In the said array all numbers occur even number of times.
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C++ Programming: Tips of the Day
Can I assume (bool)true == (int)1 for any C++ compiler?
According to the standard, you should be safe with that assumption. The C++ bool type has two values - true and false with corresponding values 1 and 0.
The thing to watch about for is mixing bool expressions and variables with BOOL expression and variables. The latter is defined as FALSE = 0 and TRUE != FALSE, which quite often in practice means that any value different from 0 is considered TRUE.
A lot of modern compilers will actually issue a warning for any code that implicitly tries to cast from BOOL to bool if the BOOL value is different than 0 or 1
Ref: https://bit.ly/3PWhs5N
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