find_peek.c

#include <stdio.h>
#include <stdlib.h>
#define MAX 1000
void find_peak(int *a,int size);
int main(void)
{

     FILE *fp;
     int i=0,v;
     int data[MAX];

     if ((fp = fopen("sample.txt", "r")) == NULL)
     {
          fprintf(stdout,"Can't open file.\n");
          exit(1);
     }
   
       while (fscanf(fp,"%d",&v) == 1 && i<MAX)
        { 
           data[i++]=v;

        }
   find_peak(data,i); 
   fclose(fp);
   getchar();
  
   return 0;
}


void find_peak(int *a,int size)
{
 
  int i,j,k;
  int n,m;
  int top_peek[30];
  int bottom_peek[30];
  
  n=m=0;
  
  for(i=0,j=1,k=2;k<size;i++,j++,k++) {
                                   
     if (a[j]>a[i] && a[j]>a[k]) {
       printf("top:%d\n",a[j]);
        top_peek[n++]=j;
     } else if (a[i]>a[j] && a[j]<a[k])  {      
            printf("bottom:%d\n",a[j]);                    
           bottom_peek[m++]=j;      
           
      }                   
  }
    



}