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这是fft的程序 运行中出了问题 不知哪的错误 #include #include #include #define N 1000 typedef struct { double real; double img; } complex; void fft(); //快速傅里叶变换 void initw(); void change(); void add(complex,complex,complex *); void mul(complex,complex,complex *); void sub(complex,complex,complex *); void output(); complex x(N),*w; int size_x=0; double PI; int main() { int i,method; void fft(); void initw(); void change(); void add(complex,complex,complex *); void mul(complex,complex,complex *); void sub(complex,complex,complex *); void divi(complex,complex,complex *); PI=atan(1)*4; printf("please input the size of x:\n"  ;scanf("%d",&size_x); printf("please input the date in x(N):\n" ;for(i=0;i initw(); output(); return 0; } void fft() { int i=0,j=0,k=0,l=0; complex up,down,product; change(); for(i=0;i l=1< for(k=0;k mul(x[j+k+l],w[size_x*k/2/l],&product); add(x[j+k],product,&up); sub(x[j+k],product,&down); x[j+k]=up; x[j+k+l]=down; } } } } void initw() { int i; w=(complex *)malloc(sizeof(complex)*size_x); for(i=0;i w.real=cos(2*PI/size_x*i); w.img=-1*sin(2*PI/size_x*i); } } void change() { complex temp; unsigned short i=0,j=0,k=0; double t; for(i=0;i k=1;j=0; t=(log(size_x)/log(2)); while((t--)>0) {j=j<<1;j|=(k&1);k=k>>1;} if(j>1) {temp=x;x=x[j];x[j]=temp;} } } void output() { int i; printf("the result are as follows \n" ;for(i=0;i printf("%.4f",x.real); if(x.img>=0.0001) printf("+%.4f\n",x.img); else if(fabs(x.img)<0.0001) printf("\n" ;else printf("%.4f\n",x.img); } } void add(complex a,complex b,complex *c) { c->real=a.real+b.real; c->img=a.img+b.img; } void mul(complex a,complex b,complex *c) { c->real=a.real*b.real-a.img*b.img; c->img=a.real*b.img+a.img*b.real; } void sub(complex a,complex b,complex *c) { c->real=a.real-b.real; c->img=a.img-b.img; } [ Last edited by 余泽成 on 2010-6-2 at 16:23 ] |
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5楼2010-06-02 14:57:36
2楼2010-06-01 14:36:21
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ompiling... fft.cpp D:\vc\FFT\fft.cpp(22) : error C2440: 'initializing' : cannot convert from 'const int' to 'complex' No constructor could take the source type, or constructor overload resolution was ambiguous D:\vc\FFT\fft.cpp(42) : error C2676: binary '[' : 'complex' does not define this operator or a conversion to a type acceptable to the predefined operator D:\vc\FFT\fft.cpp(42) : error C2228: left of '.real' must have class/struct/union type D:\vc\FFT\fft.cpp(42) : error C2676: binary '[' : 'complex' does not define this operator or a conversion to a type acceptable to the predefined operator D:\vc\FFT\fft.cpp(42) : error C2228: left of '.img' must have class/struct/union type D:\vc\FFT\fft.cpp(60) : error C2676: binary '[' : 'complex' does not define this operator or a conversion to a type acceptable to the predefined operator D:\vc\FFT\fft.cpp(61) : error C2676: binary '[' : 'complex' does not define this operator or a conversion to a type acceptable to the predefined operator D:\vc\FFT\fft.cpp(62) : error C2676: binary '[' : 'complex' does not define this operator or a conversion to a type acceptable to the predefined operator D:\vc\FFT\fft.cpp(63) : error C2676: binary '[' : 'complex' does not define this operator or a conversion to a type acceptable to the predefined operator D:\vc\FFT\fft.cpp(64) : error C2676: binary '[' : 'complex' does not define this operator or a conversion to a type acceptable to the predefined operator D:\vc\FFT\fft.cpp(93) : error C2676: binary '[' : 'complex' does not define this operator or a conversion to a type acceptable to the predefined operator D:\vc\FFT\fft.cpp(93) : error C2676: binary '[' : 'complex' does not define this operator or a conversion to a type acceptable to the predefined operator D:\vc\FFT\fft.cpp(93) : error C2676: binary '[' : 'complex' does not define this operator or a conversion to a type acceptable to the predefined operator D:\vc\FFT\fft.cpp(93) : error C2676: binary '[' : 'complex' does not define this operator or a conversion to a type acceptable to the predefined operator D:\vc\FFT\fft.cpp(103) : error C2676: binary '[' : 'complex' does not define this operator or a conversion to a type acceptable to the predefined operator D:\vc\FFT\fft.cpp(103) : error C2228: left of '.real' must have class/struct/union type D:\vc\FFT\fft.cpp(104) : error C2676: binary '[' : 'complex' does not define this operator or a conversion to a type acceptable to the predefined operator D:\vc\FFT\fft.cpp(104) : error C2228: left of '.img' must have class/struct/union type D:\vc\FFT\fft.cpp(105) : error C2676: binary '[' : 'complex' does not define this operator or a conversion to a type acceptable to the predefined operator D:\vc\FFT\fft.cpp(105) : error C2228: left of '.img' must have class/struct/union type D:\vc\FFT\fft.cpp(106) : error C2676: binary '[' : 'complex' does not define this operator or a conversion to a type acceptable to the predefined operator D:\vc\FFT\fft.cpp(106) : error C2228: left of '.img' must have class/struct/union type D:\vc\FFT\fft.cpp(108) : error C2676: binary '[' : 'complex' does not define this operator or a conversion to a type acceptable to the predefined operator D:\vc\FFT\fft.cpp(108) : error C2228: left of '.img' must have class/struct/union type 执行 cl.exe 时出错. FFT.exe - 1 error(s), 0 warning(s) 这个错误！ |
4楼2010-06-02 14:44:12
