文件输入输出目录为：F:\BP\

训练样本文件名：训练样本.txt

值为：

1

1

-1

1

-1

1

0

1

0

1

输出文件名为：阈值.txt 权值.txt

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#include "stdlib.h"

#include "math.h"

#include "conio.h"

#include "stdio.h"

#define N 2 /*/学习样本个数*/

#define IN 3 /*/输入层神经元数目*/

#define HN 3 /*/隐层神经元数目*/

#define ON 2 /*/输出层神经元数目*/

#define Z 20 /*/旧权值保存-》每次study的权值都保存下来*/

double P[IN]; /*/单个样本输入数据*/

double T[ON]; /*/单个样本教师数据*/

double W[HN][IN]; /*/输入层至隐层权值*/

double V[ON][HN]; /*/隐层至输出层权值*/

double X[HN]; /*/隐层的输入*/

double Y[ON]; /*/输出层的输入*/

double H[HN]; /*/隐层的输出*/

double O[ON]; /*/输出层的输出*/

double YU_HN[HN]; /*/隐层的阈值*/

double YU_ON[ON]; /*/输出层的阈值*/

double err_m[N]; /*/第m个样本的总误差*/

double a; /*/输出层至隐层的学习效率*/

double b; /*/隐层至输入层学习效率*/

double alpha; /*/动量因子，改进型bp算法使用*/

double d_err[ON];

FILE *fp;

/*定义一个放学习样本的结构*/

struct {

double input[IN];

double teach[ON];

}Study_Data[N];

/*改进型bp算法用来保存每次计算的权值*/

struct {

double old_W[HN][IN];

double old_V[ON][HN];

}Old_WV[Z];

int Start_Show()

{

clrscr();

printf("\n ***********************\n");

printf(" * Welcome to

use *\n");

printf(" * this program

of *\n");

printf(" * calculating the BP *\n");

printf(" * model! *\n");

printf(" * Happy every

day! *\n");

printf(" ***********************\n");

printf("\n\nBefore starting,please read the follows

carefully:\n\n");

printf(" 1.Please ensure the Path of the '训练样本.txt'(xunlianyangben.txt)

is \ncorrect,like 'F:\BP\训练样本.txt'!\n");

printf(" 2.The calculating results will be saved in the Path of

'F:\\BP\\'!\n");

printf(" 3.The program will load 10 datas when running from

'F:\\BP\\训练样本.txt'!\n");

printf(" 4.The program of BP can study itself for no more than 30000

times.\nAnd surpassing the number,the program will be ended by

itself in\npreventing running infinitely because of

error!\n");

printf("\n\n\n");

printf("Now press any key to start...\n");

getch();

getch();

clrscr();

}

int End_Show()

{

printf("\n\n---------------------------------------------------\n");

printf("The program has reached the end successfully!\n\nPress any

key to exit!\n\n");

printf("\n ***********************\n");

printf(" * This is the

end *\n");

printf(" * of the program which*\n");

printf(" * can calculate the BP*\n");

printf(" * model! *\n");

printf(" ***********************\n");

printf(" * Thanks for using! *\n");

printf(" * Happy every

day! *\n");

printf(" ***********************\n");

getch();

exit(0);

}

GetTrainingData() /*OK*/

{ int m,i,j;

int datr;

if((fp=fopen("f:\\bp\\训练样本.txt","r"))==NULL) /*读取训练样本*/

{

printf("Cannot open file strike any key

exit!");

getch();

exit(1);

}

m=0;

i=0;

j=0;

while(fscanf(fp,"%d",&datr)!=EOF)

{j++;

if(j<=(N*IN))

{if(i {

Study_Data[m].input[i]=datr;

/*printf("\nthe

Study_Datat[%d].input[%d]=%f\n",m,i,Study_Data[m].input[i]);getch();*/ /*use to check the loaded training datas*/

}

if(m==(N-1)&&i==(IN-1))

{

m=0;

i=-1;

}

if(i==(IN-1))

{

m++;

i=-1;

}

}

else

if((N*IN) {if(i {Study_Data[m].teach[i]=datr;

/*printf("\nThe

Study_Data[%d].teach[%d]=%f",m,i,Study_Data[m].teach[i]);getch();*/ /*use to check the loaded training datas*/

}

if(m==(N-1)&&i==(ON-1))

printf("\n");

if(i==(ON-1))

{m++;

i=-1;

}

}

i++;

}

fclose(fp);

printf("\nThere are [%d] datats that have been loaded

successfully!\n",j);

/*show the data which has been loaded!*/

printf("\nShow the data which has been loaded as

follows:\n");

for(m=0;m {for(i=0;i {printf("\nStudy_Data[%d].input[%d]=%f",m,i,Study_Data[m].input[i]);

}

for(j=0;j {printf("\nStudy_Data[%d].teach[%d]=%f",m,j,Study_Data[m].teach[j]);

}

}

printf("\n\nPress any key to start calculating...");

getch();

return 1;

}

/*///*/

/*初始化权、阈值子程序*/

/*///*/

initial()

{int i;

int ii;

int j;

int jj;

int k;

int kk;

/*隐层权、阈值初始化*/

for(i=0;i {

for(j=1;j {W[i][j]=(double)((rand()/32767.0)*2-1);

/*初始化输入层到隐层的权值，随机模拟0 和 1 -1 */

printf("w[%d][%d]=%f\n",i,j,W[i][j]);

}

}

for(ii=0;ii {

for(jj=0;jj {V[ii][jj]= (double)((rand()/32767.0)*2-1);

/*初始化隐层到输出层的权值，随机模拟0 和 1 -1*/

printf("V[%d][%d]=%f\n",ii,jj,V[ii][jj]);

}

}

for(k=0;k {

YU_HN[k] =

(double)((rand()/32767.0)*2-1); /*隐层阈值初始化

,-0.01 ~ 0.01 之间*/

printf("YU_HN[%d]=%f\n",k,YU_HN[k]);

}

for(kk=0;kk {

YU_ON[kk] = (double)((rand()/32767.0)*2-1);

/*输出层阈值初始化 ,-0.01 ~ 0.01 之间*/

}

return 1;

}/*子程序initial()结束*/

/*//*/

/*第m个学习样本输入子程序*/

/*/*/

input_P(int m)

{ int i,j;

for(i=0;i {P[i]=Study_Data[m].input[i];

printf("P[%d]=%f\n",i,P[i]);

}

/*获得第m个样本的数据*/

return 1;

}/*子程序input_P(m)结束*/

/*/*/

/*第m个样本教师信号子程序*/

/*/*/

input_T(int m)

{int k;

for(k=0;k T[k]=Study_Data[m].teach[k];

return 1;

}/*子程序input_T(m)结束*/

H_I_O()

{

double sigma;

int i,j;

for(j=0;j {

sigma=0;

for(i=0;i {sigma+=W[j][i]*P[i];/*求隐层内积*/

}

X[j]=sigma-YU_HN[i];/*求隐层净输入，为什么减隐层的阀值*/

H[j]=1.0/(1.0+exp(-X[j]));/*求隐层输出 siglon算法*/

}

return 1;

}/*子程序H_I_O()结束*/

O_I_O()

{int k;

int j;

double sigma;

for(k=0;k {

sigma=0.0;

for(j=0;j {

sigma+=V[k][j]*H[k];

}

Y[k]=sigma-YU_ON[k];

O[k]=1.0/(1.0+exp(-Y[k]));

}

return 1;

}

int Err_O_H(int m)

{int k;

double abs_err[ON];

double sqr_err=0;

for (k=0;k {

abs_err[k]=T[k]-O[k];

sqr_err+=(abs_err[k])*(abs_err[k]);

d_err[k]=abs_err[k]*O[k]*(1.0-O[k]);

err_m[m]=sqr_err/2;

}

return 1;

}

double e_err[HN];

int Err_H_I()

{

int j,k;

double sigma;

for(j=0;j {

sigma=0.0;

for(k=0;k {

sigma=d_err[k]*V[k][j];

}

e_err[j]=sigma*H[j]*(1-H[j]);

}

return 1;

}

saveWV(int m)

{int i;

int ii;

int j;

int jj;

for(i=0;i {

for(j=0;j {

Old_WV[m].old_W[i][j] = W[i][j];

}

}

for(ii=0;ii {

for(jj=0;jj {

Old_WV[m].old_V[ii][jj] = V[ii][jj];

}

}

return 1;

}

int Delta_O_H(int

n) /*(int m,int n)*/

{int k,j;

if(n<1) /*n<=1*/

{

for

(k=0;k {

for

(j=0;j {

V[k][j]=V[k][j]+a*d_err[k]*H[j];

}

YU_ON[k]+=a*d_err[k];

}

}

else if(n>1)

{

for

(k=0;k {

for

(j=0;j {

V[k][j]=V[k][j]+a*d_err[k]*H[j]+alpha*(V[k][j]-Old_WV[(n-1)].old_V[k][j]);

}

YU_ON[k]+=a*d_err[k];

}

}

return 1;

}

Delta_H_I(int

n) /*(int m,int n)*/

{ int i,j;

if(n<=1) /*n<=1*/

{

for (j=0;j {

for

(i=0;i {

W[j][i]=W[j][i]+b*e_err[j]*P[i];

}

YU_HN[j]+=b*e_err[j];

}

}

else if(n>1)

{

for(j=0;j {

for(i=0;i {

W[j][i]=W[j][i]+b*e_err[j]*P[i]+alpha*(W[j][i]-Old_WV[(n-1)].old_W[j][i]);

}

YU_HN[j]+=b*e_err[j];

}

}

return 1;

}

double Err_Sum()

{int m;

double total_err=0;

for(m=0;m {

total_err+=err_m[m];

}

return total_err;

}

void savequan()

{ int i,j,k;

int ii,jj,kk;

if((fp=fopen("f:\\bp\\权值.txt","a"))==NULL) /*save the result at f:\hsz\bpc\*.txt*/

{

printf("Cannot open file strike any key

exit!");

getch();

exit(1);

}

fprintf(fp,"Save the result of “权值”(quanzhi) as

follows:\n");

for(i=0;i {

for(j=0;j fprintf(fp,"W[%d][%d]=%f\n",i,j,W[i][j]);

}

fprintf(fp,"\n");

for(ii=0;ii {

for(jj=0;jj fprintf(fp,"V[%d][%d]=%f\n",ii,jj,V[ii][jj]);

}

fclose(fp);

printf("\nThe result of “权值.txt”(quanzhi) has been saved

successfully!\nPress any key to continue...");

getch();

if((fp=fopen("f:\\bp\\阈值.txt","a"))==NULL) /*save the result at f:\hsz\bpc\*/

{

printf("Cannot open file strike any key

exit!");

getch();

exit(1);

}

fprintf(fp,"Save the result of “输出层的阈值”(huozhi) as

follows:\n");

for(k=0;k fprintf(fp,"YU_ON[%d]=%f\n",k,YU_ON[k]);

fprintf(fp,"\nSave the result of “隐层的阈值为”(huozhi) as

follows:\n");

for(kk=0;kk fprintf(fp,"YU_HN[%d]=%f\n",kk,YU_HN[kk]);

fclose(fp);

printf("\nThe result of “阈值.txt”(huozhi) has been saved

successfully!\nPress any key to continue...");

getch();

}

/**********************/

/**程序入口，即主程序**/

/**********************/

void main()

{double Pre_error;

double sum_err;

int study;

int flag;

flag=30000;

a=0.7;

b=0.7;

alpha=0.9;

study=0;

Pre_error=0.0001;/*实际值为Pre_error=0.0001;*/

Start_Show();

GetTrainingData();

initial();

do

{int m;

++study;

for(m=0;m {

input_P(m);

input_T(m);

H_I_O();

O_I_O();

Err_O_H(m);

Err_H_I();

saveWV(m); /****************/

Delta_O_H(m); /*(m,study)*/

Delta_H_I(m); /*(m,study)*/

}

sum_err=Err_Sum();

printf("sum_err=%f\n",sum_err);

printf("Pre_error=%f\n\n",Pre_error);

if(study>flag)

{

printf("\n*******************************\n");

printf("The

program is ended by itself because of error!\nThe learning times is

surpassed!\n");

printf("*****************************\n");

getch();

break;

}

}while (sum_err>Pre_error);

printf("\n****************\n");

printf("\nThe program have studyed for [%d] times!\n",study);

printf("\n****************\n");

savequan(); /*save the results*/

End_Show();

}

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权值.txt

{Save the result of “权值”(quanzhi) as follows:

W[0][0]=0.350578

W[0][1]=-1.008697

W[0][2]=-0.962250

W[1][0]=0.055661

W[1][1]=-0.372367

W[1][2]=-0.890795

W[2][0]=0.129752

W[2][1]=-0.332591

W[2][2]=-0.521561

V[0][0]=-2.932654

V[0][1]=-3.720583

V[0][2]=-2.648183

V[1][0]=2.938970

V[1][1]=1.633281

V[1][2]=1.944077

}

阈值.txt

{Save the result of “输出层的阈值”(huozhi) as follows:

YU_ON[0]=-4.226843

YU_ON[1]=1.501791

Save the result of “隐层的阈值为”(huozhi) as follows:

YU_HN[0]=-0.431459

YU_HN[1]=0.452127

YU_HN[2]=0.258449

}