Question

/*––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––*/
/*    */
/* */
/* This program computes average power, average magnitude */
/* and zero crossings from a speech signal. */

#include <stdio.h>
#include <math.h>
#define MAXIMUM 50

int main(void)
{
/* Declare variables */
int k=0, npts=30;
double speech[MAXIMUM]={0.000000,-0.023438,-0.031250,-0.031250,-0.039063,-0.039063,-0.023438,0.000000,0.023438,0.070313,-0.039063,-0.039063,0.046875,0.101563,0.117188,0.101563,0.070313,0.054688,0.023438,0.000000,-0.031250,-0.039063,-0.070313,-0.070313,-0.070313,-0.070313,-0.062500,-0.046875,-0.039063,-0.031250};
/* Declare the function prototypes */

  

/* Compute and print statistics. */
printf("\n SPEECH DATA ");
print(,,);//complete the statement
printf("\n");
printf(" SPEECH STATISTICS : \n");
printf(" average power: %f \n",);//complete the statement
printf(" average magnitude: %f \n",);//complete the statement
printf(" zero crossings: %d \n",);//complete the statement

/* Exit program. */
return 0;
}

/* This function prints the data in the number of desired */
/* column numcols */
void print(double x[], int npts, int numcols)
{
int i,j;
printf("\n ");
for(j=0;j<numcols;j++)
   printf("-----------");
printf("\n");
for(j=0;j<numcols;j++)
{
   printf(" %2d to %2d",((npts/numcols)*j)+1,((npts/numcols)*j)+(npts/numcols));
}
printf("\n ");
for(j=0;j<numcols;j++)
   printf("-----------");
printf("\n");
for(i=0;i<npts/numcols;i++)
{
   for(j=0;j<numcols;j++)
       printf("%11.6lf",x[((npts/numcols)*j)+i]);
   printf("\n");
}
}
/*––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––*/
/* This function returns the average power of an array x */
/* with npts elements. */

double ave_power(double x[],int npts)
{
/* Declare and initialize variables. */
int k;
double sum=0;

/* Determine average power. */
for (k=0; k<=npts-1; k++)
sum += x[k]*x[k];

/* Return average power. */
return sum/npts;
}
/*––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––*/
/* This function returns the average magnitude of an array x */
/* with npts elements. */

double ave_magn(double x[],int npts)
{
/* Declare and initialize variables. */
int k;
double sum=0;

/* Determine average power. */
for (k=0; k<=npts-1; k++)
sum += fabs(x[k]);

/* Return average magnitude. */
return sum/npts;
}

/*––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––*/
/* This function returns a count of the number of zero */
/* crossings in an array x with npts values. */

int crossings(double x[],int npts)
{
/* Declare and initialize variables. */
int count=0, k;

/* Determine number of zero crossings. */
for (k=0; k<=npts-2; k++)
if (x[k]*x[k+1] < 0)
count++;

/* Return number of zero crossings. */
return count;
}
/*––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––*/

Answer 1

#include <stdio.h>
#include <math.h>
#define MAXIMUM 50
void print(double x[], int npts, int numcols);
double ave_power(double x[],int npts);
double ave_magn(double x[],int npts);
int crossings(double x[],int npts);

int main(void)
{
  
   /* Declare variables */
   int k=0, npts=30;
   int i=0;
   double speech[MAXIMUM]={0.000000,-0.023438,-0.031250,-0.031250,-0.039063,-0.039063,-0.023438,0.000000,0.023438,0.070313,-0.039063,-0.039063,0.046875,0.101563,0.117188,0.101563,0.070313,0.054688,0.023438,0.000000,-0.031250,-0.039063,-0.070313,-0.070313,-0.070313,-0.070313,-0.062500,-0.046875,-0.039063,-0.031250};
   /* Declare the function prototypes */

   /* Compute and print statistics. */
   printf("\n SPEECH DATA ");
   print(speech,npts,5);
   printf("\n");
  
  
   printf(" SPEECH STATISTICS : \n");
   printf(" average power: %f \n",ave_power(speech,npts));//complete the statement
   printf(" average magnitude: %f \n",ave_magn(speech,npts));//complete the statement
   printf(" zero crossings: %d \n",crossings(speech,npts));//complete the statement

   /* Exit program. */
   return 0;
}

/* This function prints the data in the number of desired */
/* column numcols */
void print(double x[], int npts, int numcols){  
   int i,j;
   printf("\n ");
   for(j=0;j<numcols;j++)
        printf("-----------");
   printf("\n");
  
   for(j=0;j<numcols;j++){
        printf(" %2d to %2d",((npts/numcols)*j)+1,((npts/numcols)*j)+(npts/numcols));
   }
   printf("\n ");
   for(j=0;j<numcols;j++)
        printf("-----------");
   printf("\n");
   for(i=0;i<npts/numcols;i++){
       for(j=0;j<numcols;j++)
           printf("%11.6lf",x[((npts/numcols)*j)+i]);
        printf("\n");
   }
}
/*––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––*/
/* This function returns the average power of an array x */
/* with npts elements. */

double ave_power(double x[],int npts)
{
   /* Declare and initialize variables. */
   int k;
   double sum=0;

   /* Determine average power. */
   for (k=0; k<=npts-1; k++)
       sum += x[k]*x[k];

   /* Return average power. */
   return sum/npts;
}
/*––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––*/
/* This function returns the average magnitude of an array x */
/* with npts elements. */

double ave_magn(double x[],int npts)
{
   /* Declare and initialize variables. */
   int k;
   double sum=0;

   /* Determine average power. */
   for (k=0; k<=npts-1; k++)
       sum += fabs(x[k]);

   /* Return average magnitude. */
   return sum/npts;
}

/*––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––*/
/* This function returns a count of the number of zero */
/* crossings in an array x with npts values. */

int crossings(double x[],int npts)
{
   /* Declare and initialize variables. */
   int count=0, k;

   /* Determine number of zero crossings. */
   for (k=0; k<=npts-2; k++){
       if ((x[k]*x[k+1]) < 0)
           count++;
   }
  

   /* Return number of zero crossings. */
   return count;
}

//###############################################################################

OUTPUT
###########

CAUsersUijinAW Documents)DevC++_WorkspacelSpeech.exe еес SPEECH DATA 1 to 6 7 to 12 13 to 18 19 to 24 25 to 30 SPEECH STATISTICS: average power : θ.ee3019 average magnitude: θ·046875 zero crossings: 2 Process exited after θ,03909 seconds with return value θ Press any key to continue . . .