C++ Exercises: Convert a octal number to decimal number
C++ For Loop: Exercise-76 with Solution
Write a C++ program to convert an octal number to a decimal number.
Pictorial Presentation:

Sample Solution:-
C++ Code :
#include <iostream>
#include <math.h>
using namespace std;
int main()
{
long octal_num, decimal_num = 0;
int i = 0;
cout << "\n\n Convert any octal number to decimal number:\n";
cout << "----------------------------------------------------\n";
cout << " Input any octal number: ";
cin>> octal_num;
while (octal_num != 0)
{
decimal_num = (long)(decimal_num + (octal_num % 10) * pow(8,
i++));
octal_num = octal_num / 10;
}
cout<<" The equivalent decimal number: " << decimal_num << "\n";
}
Sample Output:
Convert any octal number to decimal number: ---------------------------------------------------- Input any octal number: 17 The equivalent decimal number: 15
Flowchart:

C++ Code Editor:
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Next: Write a program in C++ to convert a octal number to binary number.
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