Homework two in class fourth week class

Title: Returns the number of the largest sub-arrays in an integer array. Requirements: The program must be able to handle 1000 elements; Each element is of type int32; Enter an array of shapes with positive and negative numbers in the array. One or more consecutive integers in an array make up a sub-array, each of which has a and.

The maximum value for the and of all sub-arrays. Requires a time complexity of O (n)

My partner is Hou Tao, I am in charge of program analysis, code programming, he is mainly responsible for code review and Code test plan

Work Photo:

Design ideas: With a random number to generate a fixed number of n, which has a positive, for loop n times, the default maximum Subarray and zero, starting from a[0] to add each of the array to K, and then determine whether K is greater than the maximum subarray and maxsum, greater than the other maxsum=k At last, the judge whether K is greater than 0, if less than 0 let k=0; define an array as a "1000" so that you can handle 1000 numbers,Int32 value types represent signed integers with values between 2,147,483,648 and +2,147,483,647. When it is greater than this number, it is zeroed and can be implemented with the string type.

A problem occurred: when the array is too long or too large, it will appear zero, and the array length cannot exceed 250000.

Solution: Use string strings to solve large integer problems.

Code:

#include <iostream>
#include <cmath>
using namespace Std;
void Main ()
{
int a[25000],i,j,f,n;
int maxsum = 0;
int k = 0;
cout<< "Please enter the number of numbers in the array" <<endl;
cin>>n;
for (i=0;i<n;i++)
{
J=rand ()%2+1;
F=pow ( -1.0,J);
A[i]=f*rand ()%100000;
}

cout<<endl;
cout<< "Maximum sub-array is";

for (i=0;i<n;i++)
{

K + = A[i];
if (K > Maxsum)
Maxsum = k;

if (K < 0)
k = 0;

}

cout<<maxsum<<endl;
}

Summary: The array length cannot be too large, or the program will not run. Int32 has a certain range of values, when it is more than a string to solve. In addition, through this experiment I also understand the importance of cooperation.

Homework two in class fourth week class