C Program Examples - To Count Frequency

C Program For Frequency Counting

#include<stdio.h>                                                                
                                                                                
#define MAX 10                                                                  
#define COUNTER 5                                                               
                                                                                
void main()                                                                     
{                                                                               
 float val[MAX];                                                                
 int i, low, high;                                                              
 static int range[COUNTER] = {0, 0, 0, 0, 0};                                   
                                                                                
 /* Reading and Counting */                                                     
 printf("Enter inputs from 0 to 49\n");                                         
 for(i=0;i<MAX;i++)                                                             
 {                                                                              
  scanf("%f", &val[i]);                                                         
  ++range[(int)(val[i]/10)];                                                    
 }                                                                              
 /* Printing Frequency*/                                                        
 printf("\nRange     Freuency\n");                                              
 for(i=0;i<COUNTER;i++)                                                         
 {                                                                              
  low = i*10;                                                                   
  high = low + 9;                                                               
  printf(" %3d to %3d     %3d\n", low, high, range[i]);                         
 }                                                                              
}                                                                     
                                                                                  
Output:
cc frequency-counting.c
$ ./a.out 
Enter inputs from 0 to 49
21
23
45
11
9
8
28
14
41
32

Range     Freuency
   0 to   9       2
  10 to  19       2
  20 to  29       3
  30 to  39       1
  40 to  49       2



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