Question

我正在尝试填充两个数组，然后使用函数来查找点积。有时它会起作用，有时却不起作用。我不确定我是如何填充数组的，或者我是如何处理该功能的。另外，如果我将大小设置为6并输入1,2,3,4,5,6，则第一个数组将填充1,2,3,4,1,2 ...它将在4之后重置。数组已正确填充。我不知道是否有人可以帮我解决这个问题。

#include <iostream>
using namespace std;

int dotProduct(int* array1, int*array2, int size);

int main() {

    int  size = 0;

    int *array_one = new int[size]{};
    int *array_two = new int[size]{};

    cout << "Please enter array size:" << "\n";
    cin >> size;

    while (size <= 0) { // First while loop, checking array size

        cout << "Please enter array size:" << "\n";
        cin >> size;
    }                 //end of first while loop

    cout << "========= Begin Entering Array Elements =========" 
         << "\n";
    cout << "Array 1: "<< "\n";

    for (int i = 0; i<size; i++){ // Filling up first array, first for 
        loop
            cout << "Enter element number "<< i+1 << ": " ;
        cin >> array_one[i];
    }                               // end or first for loop

    cout <<"=================================================" << 
        "\n";
    cout << "Array 2:" << "\n";

    for (int i = 0; i<size; i++){ // Filling up first array, first for 
        loop
            cout << "Enter element number "<< i+1 << ": " ;
        cin >> array_two[i];
    }

    cout << "The dot product is: " << 
        dotProduct(array_one,array_two,size);
}

int dotProduct(int *arrayUno, int *arrayDos, int size){

    int total = 0;

    for (int i =0; i <= size ; i++ ){
        total = total + (*arrayUno)*(*arrayDos);
        arrayUno++;
        arrayDos++;
    }

    return total;
}

Answer 1

int  size = 0;

int *array_one = new int[size]{};
int *array_two = new int[size]{};

cout << "Please enter array size:" << "\n";
cin >> size;

while (size <= 0) { // First while loop, checking array size

    cout << "Please enter array size:" << "\n";
    cin >> size;
}                 //end of first while loop

在获得大小之前分配数组。你必须先获得尺寸。将此代码更改为：

int size = 0;

cout << "Please enter array size:" << "\n";
cin >> size;

int *array_one = new int[size]{};
int *array_two = new int[size]{};

找到Dot产品的功能

1 个答案: