硬编码二维数组值

Question

Trying to insert values into a 2D array, but the output isnt giving my values, instead random letters

int myArr[8][2] = {700,730,760,790,810,840,910,1000}{0.011,0.035,0.105,0.343,0.789,2.17,20,145};
cout  << myArr << endl;
system("Pause");

How should I adjust the code, or is it easier to use a text file and insert?

Answer 1

Numerous problems:

• the array dimensions are wrong
• you don't have outer braces or a comma for the nested arrays
• you're trying to store double precision floating point values in an int array
• you can't use cout with an entire array.

The array declaration should probably be something like this:

double myArr[2][8] = { {700,730,760,790,810,840,910,1000},
                       {0.011,0.035,0.105,0.343,0.789,2.17,20,145} };

and to output the contents you could do something like this:

for (int i = 0; i < 2; ++i)
{
    for (int j = 0; j < 8; ++j)
    {
        cout << " " << myArr[i][j];
    }
    cout << endl;
}

Live Demo

Answer 2

First - you can't print the whole array just by using cout << myArr , you need to iterate over the elements of the array using a for loop.

Second - you are trying to put decimal values into an integer array which will truncate all of the decimals.

Third - Your array should be sized myArr[8][2] not myArr[2][8] . I'm surprised your compiler lets you get away with this. You should probably look into using a different compiler.

Answer 3

You need to iterate through each row and column, otherwise you're just printing out the pointer value of the array handle.

for (int i=0;i<8;i++){
  for (int j=0;j<2;j++){
    cout << myArr[i][j] << " ";
  }
  cout << endl;
}
system("Pause");