计算数组的平方值的平均值

Question

我使用以下代码来计算数组平方值的平均值。但它返回错误“143表达式必须有指向对象类型的指针”。

Int16 mono_input;
Int16 delayed_input;

double sum_sq;
double power;

int j;
int n;

delayed_input = delay_1(mono_input); //delay_1 returns sample of sound (eg 1024 samples)

for ( n = 0 ; n < 1024 ; n++)
{
  sum_sq += delayed_input [n] * delayed_inputA [n] ; //  to get the squared values of n th sample and add that to the previous value. but here it returns error 143.
}

power  = sum_sq/ 1024; // to get the average of squared values 

Answer 1

你输错了第二个delayed_input：

sum_sq += delayed_input [n] * delayed_inputA [n] ;

应该（我假设）

sum_sq += delayed_input [n] * delayed_input [n] ;