C program to convert octal number to decimal number.

source code

#include<stdio.h>

#include<math.h>

int main()

{

 long int octal,decimal =0;

 int i=0;

  printf("Enter any octal number: ");

  scanf("%ld",&octal);

   while(octal!=0)

{

decimal = decimal + (octal % 10) * pow(8,i++);

octal = octal/10;

}

printf("Equivalent decimal value: %ld",decimal);

getch();

return 0;

}