红色为问题所在，在我的电脑上就会出现如下错误： sample8.c - 3 errors
52, 5 Undeclared identifier 'IIRFilterPtr'.
52, 18 syntax error; found 'identifier' expecting ';'.
52, 18 Undeclared identifier 'filter_information'.
去掉52行编译通过，连接又出问题， 1 Project link error
Undefined symbol '_FFT' referenced in "sample8.c".
但是，我在另一台机器上就没有问题。可以通过。 是不是因为我们的CVI版本不同，或者是包含的库不同？ 怎么解决啊？？谢谢啦！！！！！！ —————————————————————————————————————————— #include <ansi_c.h>
#include <analysis.h>
#include <cvirte.h>
#include <userint.h>
#include "sample8.h" static int panelHandle;
#define NUMPOINTS 256 AnalysisLibErrType FFT (double arrayXReal[], double arrayXImg[], int numberOfElements); int main (int argc, char *argv[])
{
if (InitCVIRTE (0, argv, 0) == 0)
return -1; /* out of memory */
if ((panelHandle = LoadPanel (0, "sample8.uir", PANEL)) < 0)
return -1;
DisplayPanel (panelHandle);
RunUserInterface ();
DiscardPanel (panelHandle);
return 0;
} int CVICALLBACK PanelCallback (int panel, int event, void *callbackData,
int eventData1, int eventData2)
{
switch (event)
{
case EVENT_GOT_FOCUS: break;
case EVENT_LOST_FOCUS: break;
case EVENT_CLOSE:
QuitUserInterface (0);
break;
}
return 0;
} int CVICALLBACK ReplotWaveforms (int panel, int control, int event,
void *callbackData, int eventData1, int eventData2)
{
//
double wave1Amp,wave2Amp,wave1Circle,wave2Circle;
double ripple,attenuation,upper_cutoff_frequency,lower_cutoff_frequency,sample_rate;
double waveData1[NUMPOINTS],waveData2[NUMPOINTS],tempData[NUMPOINTS],signalData[NUMPOINTS];
int filter_style,filter_type,filter_order,window_style,use_pulse,i;
// IIRFilterPtr
IIRFilterPtr filter_information;
switch (event)
{
case EVENT_COMMIT:
//
DeleteGraphPlot(panel,PANEL_FREQGRAPH,-1,VAL_DELAYED_DRAW);
DeleteGraphPlot(panel,PANEL_TIMEGRAPH,-1,VAL_DELAYED_DRAW);
DeleteGraphPlot(panel,PANEL_WINDOWGRAPH,-1,VAL_DELAYED_DRAW);
DeleteGraphPlot(panel,PANEL_FILTERGRAPH,-1,VAL_DELAYED_DRAW);
//
GetCtrlVal(panel,PANEL_WAVE1AMP,&wave1Amp);
GetCtrlVal(panel,PANEL_WAVE2AMP,&wave2Amp);
GetCtrlVal(panel,PANEL_WAVE1CIRCLE,&wave1Circle);
GetCtrlVal(panel,PANEL_WAVE2CIRCLE,&wave2Circle);
//
SinePattern(NUMPOINTS,wave1Amp,0.0,wave1Circle,waveData1);
SinePattern(NUMPOINTS,wave2Amp,0.0,wave2Circle,waveData2);
Add1D(waveData1,waveData2,NUMPOINTS,signalData);
//
PlotY(panelHandle,PANEL_TIMEGRAPH,signalData,NUMPOINTS,VAL_DOUBLE,VAL_THIN_LINE,VAL_NO_POINT,VAL_SOLID,1,VAL_RED);
//FFT
for(i=0;i<NUMPOINTS;i++)
tempData=0;
FFT(signalData,tempData,NUMPOINTS);
for(i=0;i<NUMPOINTS;i++)
signalData=sqrt(signalData*signalData+tempData*tempData);
PlotY(panelHandle,PANEL_FREQGRAPH,signalData,NUMPOINTS/2,VAL_DOUBLE,VAL_THIN_LINE,VAL_NO_POINT,VAL_SOLID,1,VAL_RED);
break;
}
return 0;
} int CVICALLBACK QuitCallback (int panel, int control, int event,
void *callbackData, int eventData1, int eventData2)
{
switch (event)
{
case EVENT_COMMIT: break;
}
return 0;
}
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