C program to count the number of students in each group

In this tutorial, we are going to write a C Program in which we have given below is the list of marks obtained by a class of 50 students in an annual examination. 43 65 51 27 79 11 56 61 82 09 25 36 07 49 55 63 74 81 49 37 40 49 16 75 87 91 33 24 58 78 65 56 76 67 45 36 63 12 21 73 49 51 19 39 49 68 93 85 59

Write a program to count the number of students belonging to each of the following groups of marks: 0-9,10-19,20-29,---,100. C Programming with practical program code and step-by-step full complete explanation.

C Program to count the number of students in each group.

 
#include<stdio.h>
#include<conio.h>

#define MAXVAL 50
#define COUNTER 11

void main()
{
    float value[MAXVAL];

    int i, low, high;
    int group[COUNTER]={0,0,0,0,0,0,0,0,0,0,0};

    for(i=0;i<MAXVAL;i++)
    {
        scanf("%f",&value[i]);
        ++group[(int)(value[i]/10)];
    }

    printf("\n");
    printf("GROUP RANGE FREQUENCEY");

    for(i=0;i<COUNTER;i++)
    {
        low=i*10
        if(i==10)
            high=100;
        else
            high=low+9;
        printf("%2d%3d to %3d%d",i+1,low,high,group[i]);
    }
}

Output

 
43 65 51 27 79 11 56 61 82 09 25 36 07 49 55 63 74 81 49 37 40 49 16 75 87 91 33 24 58 78 65 56 76 67 45 54 36 63 12 21 73 49 51 19 39 49 68 93 85 59    

GROUP          RANGE          FREQUENCY
1              0 to 9         2
2              10 to 19       4
3              20 to 29       4
4              30 to 39       5
5              40 to 49       8
6              50 to 59       8
7              60 to 69       7
8              70 to 79       6
9              80 to 89       4
10             90 to 99       2
11             100 to 100     0