Question

所以我编写了一个代码，用于读取包含一组数据的文件。之后我将数据四舍五入到小数点后3位。后来，我试图在一些特定范围内取平均数据。范围在0,0.5和0.5到1.0之间......但问题是，当我这样做时，它不会使用舍入数据，而是使用原始数据。我应该如何更改我的代码，以便使用舍入数据？我如何制作代表圆形数据的东西，以便我可以将其用于我的其余编码？我的代码是

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

// Data size
#define MAX_ROWS 20
#define MAX_COLUMNS 20
#define LOW_ERROR 0.0
#define HIGH_ERROR 2.5

int main(void) 
{
// Decalred variables
int rowIndex = 0;
int columnIndex = 0;
double rawData[MAX_ROWS][MAX_COLUMNS]; // 2-dimensional array to store our raw data
int decimalPlaces = 3;
float rangeValue[6] = { 0.0,0.5,1.0,1.5,2.0,2.5 };
int i, num = 0;
float total = 0.0, average;
// Print out the rawdata array
printf(" --- RAW DATA ---\n");
for (rowIndex = 0; rowIndex < MAX_ROWS; rowIndex++) 
{
    // Read up until the last value
    for (columnIndex = 0; columnIndex < MAX_COLUMNS; columnIndex++) 
    {
        printf("%.9lf ", rawData[rowIndex][columnIndex]);
    }
    printf("\n");
}

// Print out the roundup data array
printf(" --- ROUNDED DATA ---\n");
for (rowIndex = 0; rowIndex < MAX_ROWS; rowIndex++)
{
    // Read up until the last value
    for (columnIndex = 0; columnIndex < MAX_COLUMNS; columnIndex++)
    {
        if (rawData[rowIndex][columnIndex] < LOW_ERROR)
            printf("%.3f ", LOW_ERROR);
        else if (rawData[rowIndex][columnIndex] > HIGH_ERROR)
            printf("%.3f ", HIGH_ERROR);
        else
            printf("%.3f ", ceil(rawData[rowIndex][columnIndex] * 1000.0) / 1000.0);
    }
    printf("\n");
}

//Calculate and store the averages for each range
printf(" --- RANGE TABLE ---\n");
for (i = 0; i < 5; i++)
{
    for (rowIndex = 0; rowIndex < MAX_ROWS; rowIndex++)
    {
        for (columnIndex = 0; columnIndex < MAX_COLUMNS; columnIndex++)
            if (rawData[rowIndex][columnIndex] > rangeValue[i] && rawData[rowIndex][columnIndex] <= rangeValue[i + 1])
            {
                total = total + rawData[rowIndex][columnIndex];
                num++;
            }

    }

    average = total / num;
    printf("%f \n", average);
    total = 0;
    average = 0;
    num = 0;
}

return 0;

}

Answer 1

您需要添加一个额外的数组来保存舍入数据。类似的东西：

double roundedData[MAX_ROWS][MAX_COLUMNS]; 

for (rowIndex = 0; rowIndex < MAX_ROWS; rowIndex++)
{
    for (columnIndex = 0; columnIndex < MAX_COLUMNS; columnIndex++)
    {
        roundedData[rowIndex][columnIndex] = ceil(rawData[rowIndex][columnIndex] * 1000.0) / 1000.0);
    }
}

在此之后，您可以使用变量roundedData来计算平均值。

使用舍入数据取平均值

1 个答案: