Write a function to convert a decimal number to a binary number.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question
C++
is my answers correct ?
- Write a function to convert a decimal number to a binary number.
Answer:
#include <iostream>
#include <string>
using namespace std;
string decToBin(int dec) {
string bin = "";
while (dec > 0) {
bin = to_string(dec % 2) + bin;
dec /= 2;
}
return bin;
}
int main() {
cout << decToBin(10) << endl;
return 0;
}
- Write a function to calculate s =1!+2!+3!+....+10!
Answer:
#include <iostream>
using namespace std;
int findFactSum(int n)
{
int f = 1, Sum = 0;
for (int i = 1; i <= n; i++) {
f = f * i;
Sum += f;
}
return Sum;
}
int main()
{
int n = 10;
cout << findFactSum(n);
return 0;
}
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