Algorithm for To convert roman number to it’s decimal equivalent

Description:

In this program we have to take the roman value. This value is converted into a it’s equivalent decimal number.

Ex:  X=10

Algorithm:

Step 1: Start

Step 2: read the roman numerical as string

Step 3: find length of roman numerical

Step 4: for each charcter in the string

i.        if(char=I) then decimal=1

ii.        if(char=V) then decimal=5

iii.        if(char=X) then decimal=10

iv.        if(char=L) then decimal=50

v.        if(char=C) then decimal=100

vi.        if(char=D) then decimal=500

vii.        if(char=M) then decimal=1000

viii.        otherwise invalid character

Step 5: repeat step 4 until the length of the string

Step 6: k=char[length-1]

Step 7: for each character of decimal string

i)         if(decimal[i]>dec[i-1]) then k=k-decimal[i-1]

ii)       else

       if(decimal[i]=decimal[i-1} or decimal[i]<decimal[i-1])                       then k=k+decimall[i-1]

Step 8: repeat step 7 until the length of decimal string

Step 9: print decimal value

Step 10: Stop

Algorithm

Flow chart

Program