 ### Program 97:Convert Roman to Decimal

Program 97:
```#include<stdio.h>
#include<string.h>
#include<stdlib.h>
int main()
{
int a,len,i,j,k;
char rom;
printf("Enter the Roman Numeral:\n");
scanf("%s",rom);
len=strlen(rom);
for(i=0; i<len; i++)
{
if(rom[i]=='I')
a[i]=1;
else if(rom[i]=='V')
a[i]=5;
else if(rom[i]=='X')
a[i]=10;
else if(rom[i]=='L')
a[i]=50;
else if(rom[i]=='C')
a[i]=100;
else if(rom[i]=='D')
a[i]=500;
else if(rom[i]=='M')
a[i]=1000;
else
{
printf("\nInvalid Value");
exit(0);
}
}
k=a[len-1];
for(i=len-1; i>0; i--)
{
if(a[i]>a[i-1])
k=k-a[i-1];
else if(a[i]==a[i-1] || a[i]<a[i-1])
k=k+a[i-1];
}
printf("Its Decimal Equivalent is:");
printf("%d\n",k);
return 0;
}```
Explanation:

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Output:

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