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C++ Exercises: Read an integer n and prints the factorial of n

C++ Basic: Exercise-69 with Solution

For n = 10, write a C++ program that reads the integer n and prints its factorial.

Pictorial Presentation:

C++ Exercises: Read an integer n and prints the factorial of n

Sample Solution:

C++ Code :

#include <iostream>
using namespace std;

long long factorial(int num) {
    if (num == 0) {
        return 1;
    }
    else {
        return num * factorial(num-1);
    }
}

int main() {
    int num;
    cin >> num;
    cout << factorial(num) << endl;
}

Sample Output:

sample Output
1

Flowchart:

Flowchart:  Read an integer n and prints the factorial of n

C++ Code Editor:

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Next: Write a C++ program to replace all the lower-case letters of a given string with the corresponding capital letters.

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C++ Programming: Tips of the Day

Why is there no std::stou?

The most pat answer would be that the C library has no corresponding "strtou", and the C++11 string functions are all just thinly veiled wrappers around the C library functions: The std::sto* functions mirror strto*, and the std::to_string functions use sprintf.

Ref: https://bit.ly/3wtz2qA

 





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