C Exercises: Convert a decimal number to binary
C Recursion: Exercise-11 with Solution
Write a program in C to convert a decimal number to binary using recursion.
Pictorial Presentation:
Sample Solution:
C Code:
#include<stdio.h>
long convertBinary(int);
int main()
{
long biNo;
int decNo;
printf("\n\n Recursion : Convert decimal number to binary :\n");
printf("---------------------------------------------------\n");
printf(" Input any decimal number : ");
scanf("%d",&decNo);
biNo = convertBinary(decNo);//call the function convertBinary
printf(" The Binary value of decimal no. %d is : %ld\n\n",decNo,biNo);
return 0;
}
long convertBinary(int decNo)
{
static long biNo,r,fctor = 1;
if(decNo != 0)
{
r = decNo % 2;
biNo = biNo + r * fctor;
fctor = fctor * 10;
convertBinary(decNo / 2);//calling the function convertBinary itself recursively
}
return biNo;
}
Sample Output:
Recursion : Convert decimal number to binary : --------------------------------------------------- Input any decimal number : 66 The Binary value of decimal no. 66 is : 1000010
Flowchart:
C Programming Code Editor:
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Next: Write a program in C to check a number is a prime number or not using recursion.
C Programming: Tips of the Day
Static variable inside of a function in C
The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().
The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.
The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().
Ref : https://bit.ly/3fOq7XP
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