X

C Program to Convert Octal Number to Decimal and vice-versa

In this example, you will learn to convert octal numbers to decimal and vice-versa manually by creating a user-defined function.

Limited time offer: Get 10 free Adobe Stock images.ADS VIA CARBON

To understand this example, you should have the knowledge of the following C programming topics:


Example 1: Program to Convert Decimal to Octal

#include #include int convertDecimalToOctal(int decimalNumber); int main() { int decimalNumber; printf("Enter a decimal number: "); scanf("%d", &decimalNumber); printf("%d in decimal = %d in octal", decimalNumber, convertDecimalToOctal(decimalNumber)); return 0; } int convertDecimalToOctal(int decimalNumber) { int octalNumber = 0, i = 1; while (decimalNumber != 0) { octalNumber += (decimalNumber % 8) * i; decimalNumber /= 8; i *= 10; } return octalNumber; }

Output

Enter a decimal number: 78
78 in decimal = 116 in octal

Example 2: Program to Convert Octal to Decimal

#include #include long long convertOctalToDecimal(int octalNumber); int main() { int octalNumber; printf("Enter an octal number: "); scanf("%d", &octalNumber); printf("%d in octal = %lld in decimal", octalNumber, convertOctalToDecimal(octalNumber)); return 0; } long long convertOctalToDecimal(int octalNumber) { int decimalNumber = 0, i = 0; while(octalNumber != 0) { decimalNumber += (octalNumber%10) * pow(8,i); ++i; octalNumber/=10; } i = 1; return decimalNumber; }

Output

Enter an octal number: 116
116 in octal = 78 in decimal
Categories: Uncategorized
ilexjjtt-ca: