Initial commit

c++/Others/Using algorithm for code assignment to characters of varying probabilities.cpp

@@ -0,0 +1,115 @@
+Using algorithm for code assignment to characters of varying probabilities
+
+#include<stdio.h>
+#include<conio.h>
+#include<math.h>
+int temp,i,j,col=0,n=100,count=0,b[10][2];
+float a[10],sum=100;
+char c[10][10];
+void main()
+{
+void part(int,int);
+clrscr();
+printf("Enter number of characters ");
+while(n>10)
+{
+printf("(Not more than 10) ");
+scanf("%d",&n);
+}
+while(sum>1)
+{
+printf("Enter their probabilities of occurences
+");
+sum=0;
+for(i=1;i<=n;i++)
+{
+printf(".");
+scanf("%f",&a[i]);
+while(a[i]>=1)
+a[i]=a[i]/10;
+sum=sum+a[i];
+if(sum>1)
+break;
+}
+if(sum>1)
+printf("Sum of probabilities must be less than or equal to 1 !
+");
+}
+for(i=0;i<10;i++)
+{
+for(j=0;j<10;j++)
+c[i][j]='*';
+}
+for(i=0;i<n;i++)
+{
+for(j=0;j<n;j++)
+{
+if(a[j]<a[j+1])
+{
+temp=a[j];
+a[j]=a[j+1];
+a[j+1]=temp;
+}}}
+printf("
+
+");
+part(1,n);
+printf("The codes are 
+");
+for(i=0;i<n;i++)
+{
+for(j=0;j<10;j++)
+printf("%c ",c[i][j]);
+printf("
+");
+}
+getch();
+}
+void part(int low,int high)
+{
+int min=100,k,z,sum=0,dif,sum1=0,l=0;
+z=(high-low);
+z=abs(z);
+for(j=0;j<10;j++)
+for(i=0;i<2;i++)
+b[j][i]=0;
+if(z>1)
+{
+count++;
+for(i=low-1;i<high;i++)
+sum=sum+a[i];
+sum1=a[low-1];
+sum=sum-a[low-1];
+for(i=low;i<=high;i++)
+{
+dif=sum-sum1;
+sum1=a[i]+sum1;
+sum=sum-a[i];
+b[l][0]=abs(dif);
+b[l][1]=i;
+l++;
+}
+for(i=0;i<l;i++)
+if(min>b[i][0])
+{
+min=b[i][0];
+k=b[i][1];
+}
+for(i=low-1;i<k;i++)
+c[i][col]='0';
+for(i=k;i<high;i++)
+c[i][col]='1';
+col++;
+part(low,k);
+part(k+1,high);
+}
+else
+{
+c[low][col]='1';
+c[high][col]='0';
+if(c[high+1][col]=='*'&&high<=9)
+while(c[high+1][col]=='*')
+col--;
+col++;
+}
+}