Octal(8) To Decimal(2)

#include
#include
#include
void main()
{
char oct[10]="14";
int n,sum=0,i=0,len,r;
clrscr();
n=atoi(oct);
len=strlen(oct);
while(i<=len)
{
r=n%10;
n=n/10;
sum=sum+(r*pow(8,i));
i++;
}
printf("\nOctal(8) %s Equalent Decimal(2) is %d",oct,sum);
getch();
}
Output
Octal(8) 14 Equalent Decimal(2) is 12