#include #include #include #include using namespace std; int main() { srand(time(NULL)); vector myVect; // Write your code here return 0; }

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The question presents a C++ program skeleton and a proposed complete solution that fills a vector with random values and prints them. We'll examine the provided answer step by step. 1) Includes and setup - The code includes: , , , and uses namespace std. - In addition to , to use rand() and srand(), the standard header is typically required. The provided solution omits #include , which may lead to a compilation warning or error depending on the compiler settings. A robust version should include as well. - srand(time(NULL)) is used to seed the pseudo-random number generator with the current time, ensuring different sequences across runs. This is a common and acceptable practice for simple randomization. 2) Vector declaration - The line: vector myVect; creates an empty vector of integers, which is correct for storing the generated random values. 3) Filling the vector with random values - The loop runs for i from 0 to 7 (total of 8 iterations), which matches the requirement to fill the vector with 8 values. - Inside the loop, int randomValue = 50 + rand() % 21 generates a number in the range [50, 70], because rand() % 21 yields a value in [0, 20], and adding 50 shifts it to [50, 70]. This correctly achieves the desired range. - myVect.push_back(randomValue) appends each generated value to the vector, which is the right approach. 4) Displaying the contents - The second loop iterates over the vector and outputs each element followed by a space: cout << myVect[i] << " "; This prints all values on a single line, separated by spaces, as required. - After the loop, cout << endl; prints a trailing newline, which is a clean way to end the line. 5) Return value - return 0; indicates successful program termination, which is standard for the main function. 6) Potential improvements and notes - Missing header: As noted, you should #include to declare rand() and srand(), since these come from the C standard library. Without it, some compilers may still compile due to implicit declarations, but it's not portable or standards-compliant. - Random range correctness: The expression 50 + rand() % 21 correctly yields 50–70 inclusive. If a programmer wanted a different distribution, they could consider modern C++ facilities for better randomness and distribution control. - Performance/quality: For larger ranges or more complex needs, using std::mt19937 with std::uniform_int_distribution would be preferable to rand(). - Output formatting: If a perfectly trimmed line is desired (no trailing space), one could modify the print loop to conditionally print a space only between elements, e.g., printing a space before all but the first element or using a boolean first flag. In summary, the provided solution correctly seeds the RNG, fills the vector with eight integers in the 50–70 range, and prints them on a single line. The primary technical omission is the missing #include , which is needed for portable compilation of rand() and srand().

MCD4720 - T3 - 2024 Quiz2 B_T3_2024

#include<iostream> #include<string> #include <vector> #include <ctime> using namespace std; int main() { srand(time(NULL)); vector<int> myVect; // Write your code here return 0; }

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