66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
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/*
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* C Program to Convert Roman Number to Decimal Number
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*/
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#include <stdio.h>
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#include <string.h>
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int digit(char);
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int main()
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{
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char romanval[1000];
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int i = 0;
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long int number = 0;
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printf("Enter roman num (Valid digits are I, V, X, L, C, D, M):\n");
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scanf("%s", romanval);
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while (romanval[i])
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{
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if (digit(romanval[i]) 2)
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{
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if (digit(romanval[i]) = digit(romanval[i+1]))
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number = number + digit(romanval[i]);
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else
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{
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number = number + (digit(romanval[i + 1]) -
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digit(romanval[i]));
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i++;
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}
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i++;
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}
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printf("Its decimal value is : %ld", number);
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return 0;
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}
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int digit(char c)
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{
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int value = 0;
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switch (c)
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{
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case 'I':
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value = 1;
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break;
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case 'V':
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value = 5;
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break;
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case 'X':
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value = 10;
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break;
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case 'L':
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value = 50;
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break;
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case 'C':
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value = 100;
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break;
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case 'D':
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value = 500;
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break;
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case 'M':
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value = 1000;
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break;
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case '0':
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value = 0;
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break;
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default:
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value = -1;
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}
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return value;
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}
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