TheAlgorithms-C/conversions/octal_to_decimal.c

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#include <math.h>
#include <stdio.h>
// Converts octal number to decimal
int convertValue(int num, int i) { return num * pow(8, i); }
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long long toDecimal(int octal_value)
{
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int decimal_value = 0, i = 0;
while (octal_value)
{
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// Extracts right-most digit and then multiplies by 8^i
decimal_value += convertValue(octal_value % 10, i++);
// Shift right in base 10
octal_value /= 10;
}
return decimal_value;
}
int main()
{
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printf("Enter octal value: ");
int octal_value;
scanf("%d", &octal_value);
long long result = toDecimal(octal_value);
printf("%d in decimal is %lld\n", octal_value, result);
return 0;
}