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Modified variance.c: renamed file (lowercase), better filling method (with realloc), optimized sorting and more readable code

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This commit is contained in:
Mehdi ALAOUI 2017-04-05 01:23:33 +01:00
parent 382f084834
commit 1633281630
2 changed files with 54 additions and 56 deletions
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56
VARIANCE.C
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@ -1,56 +0,0 @@
#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
int a[10],n,i,j,temp,sum=0;
float mean,var,stand;
clrscr();
printf("Enter no. for Random Numbers :");
scanf("%d",&n);
for(i=0;i<n;i++)
{
a[i]=rand()%100;
}
printf("Random Numbers Generated are :\n");
for(i=0;i<n;i++)
{
printf("\n%d",a[i]);
}
printf("\n");
printf("\nSorted Data:");
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
if(a[i]<a[j])
{
temp=a[i];
a[i]=a[j];
a[j]=temp;
}
}
}
for(i=0;i<n;i++)
{
printf("\n%d",a[i]);
sum=sum+a[i];
}
mean=sum/(float)n;
printf("\nMean :");
printf("%f",mean);
printf("\n");
for(i=0;i<n;i++)
{
sum=sum+(pow((a[i]-mean),2));
}
var=sum/(float)n;
printf("\nVariance is : %f",var);
printf("\n");
stand=sqrt(var);
printf("\nStandard Deviation is : %f",stand);
getch();
}

54
variance.c Normal file
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#include<stdio.h>
#include <stdlib.h>
#include<math.h>
int main() {
int *ARRAY=NULL,ARRAY_LENGTH,i,TEMPORARY_ELEMENT,isSorted=0;
float MEAN=0,VARIANCE=0,STAND;
printf("Enter no. for Random Numbers :");
scanf("%d",&ARRAY_LENGTH);
ARRAY=(int *)realloc(ARRAY,ARRAY_LENGTH*(sizeof(int))); //We allocate the dedicated memory
for(i=0;i<ARRAY_LENGTH;i++) //We generate the random numbers
ARRAY[i]=rand()%100;
printf("Random Numbers Generated are :\n"); //We display them
for(i=0;i<ARRAY_LENGTH;i++)
printf("%d ",ARRAY[i]);
printf("\nSorted Data: ");//Then we sort it using Bubble Sort..
while(!isSorted){ //While our array's not sorted
isSorted=1; //we suppose that it's sorted
for(i=0;i<ARRAY_LENGTH-1;i++){ //then for each element of the array
if(ARRAY[i]>ARRAY[i+1]){ // if the two elements aren't sorted
isSorted=0; //it means that the array is not sorted
TEMPORARY_ELEMENT=ARRAY[i]; //and we switch these elements using TEMPORARY_ELEMENT
ARRAY[i]=ARRAY[i+1];
ARRAY[i+1]=TEMPORARY_ELEMENT;
}
}
}
for(i=0;i<ARRAY_LENGTH;i++) {
printf("%d ",ARRAY[i]);
MEAN=MEAN+ARRAY[i];
}
MEAN=MEAN/(float)ARRAY_LENGTH;
for(i=0;i<ARRAY_LENGTH;i++)
VARIANCE=VARIANCE+(pow((ARRAY[i]-MEAN),2));
VARIANCE=VARIANCE/(float)ARRAY_LENGTH;
STAND=sqrt(VARIANCE);
printf("\n\n- Mean is: %f\n",MEAN);
printf("- Variance is: %f\n",VARIANCE);
printf("- Standard Deviation is: %f\n",STAND);
}