juanji.txt

卷积的c语言实现

#include "stdio.h"
#include "math.h"

void conv(float xin[], float h[], int lx, int lh)

{

int i,j; 

float sum,xout;

for (i = 0; i < lx + lh - 1; i++)

{

sum = 0.0;

if( i < lh - 1 )

{

for(j = 0; j < i+1; j++)

sum += xin[j] * h[i-j];

xout = sum;
printf(" %f",xout);

}

else if(i > lx - 1)

{

for(j = lh -1; j > i - lx; j--)

sum += xin[i-j] * h[j];

xout = sum;
printf(" %f",xout);

}

else

{

for(j = 0; j < lh; j++)

sum += xin[i-j] * h[j];

xout = sum;
printf(" %f",xout);

}



} 
} 

main()
{float a[5],b[5],xout[9];
   int i,lx,lh;
   lx = 5;
   lh = 5;
   for(i=0;i<5;i++)
   {a[i]=1;
   b[i]=1;
   }
conv(a,b,5,5);

}