Question

我已经复制了下面的整个代码并对我收到错误的行进行了评论。

我正在尝试测试我在网上找到的iDFT算法，但我无法将其编译，当我尝试编译时，任何人都可以帮我解决以下错误消息吗？

错误：数组下标
的类型'float [100] [float]'无效

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

 int main()
 {
  float static X[100],X_Real[100],X_Imag[100];
  float k,n,N;

  printf("\t\t\t Inverse Discrete Fourier Transform(IDFT)"); 
  printf("\n\n Enter the length of DFT N=");
  scanf("%f",&N);
  printf("\n Enter the real and imaginary parts of X(k) as follows:\n\n"

 "X(k) =Real{X(k)} Img{X(k)} \n" );

  for(k=0;k<N;k++)
 {
  printf("X(%1.0f)=",k);                 
  scanf("%f %f",&X_Real[k],&X_Imag[k]);  // This is where I get the error
 }

 for(n=0;n<N;n++)
 {
  X[n]=0;
  for(k=0;k<N;k++)
  {
   X[n]=X[n]+X_Real[k]*cos((2*M_PI*k*n)/N)-X_Imag[k]*sin((2*M_PI*k*n)/N);
  }
  X[n]=X[n]/N;
 }

 printf("\n\n The sequence x(n) is as follows...");
 for(n=0;n<N;n++)
 {
  printf("\n\n X(%1.0f)=%3.6f",n,X[n]);
 }

 getch();
}

Answer 1

The error is telling you exactly what's wrong: k, n, and N must be declared as integers. You can't access an array with a float index (what's the 2.34th value in this array)?

错误“无效类型'浮点数[100] [浮点数]'对于数组下标”

1 个答案: