1. CSE 1321 - Module 1 A Programming Primer
10/4/2019
CSE 1321 Module 1

2. Ps Skeletons BEGIN MAIN END MAIN
Note: every time you BEGIN something, you must END it!
Write them as pairs!
10/4/2019
CSE 1321 Module 1

3. Skeletons #include <iostream> int main() {
std::cout << "Hello World!\n"; }
Note: Capitalization matters!
10/4/2019
CSE 1321 Module 1

4. Skeletons #2 – Same thing!
#include <iostream>
using namespace std;
int main() {
cout << "Hello, World!" << endl; }
Note: The “namespace” thing keeps you from having to type “std” all the time!
10/4/2019
CSE 1321 Module 1

5. Ps Printing BEGIN MAIN PRINT “Hello, World!”
PRINT “Bob” + “ was” + “ here”
END MAIN Ps
10/4/2019
CSE 1321 Module 1

6. Printing #include <iostream> using namespace std; int main() {
cout << "Hello, World!" << endl;
cout << "Bob" << " was" << " here!" << endl; }
10/4/2019
CSE 1321 Module 1

7. Declaring/Assigning Variables
BEGIN MAIN
CREATE userName
CREATE studentGPA
userName ← “Bob”
studentGPA ← 1.2
END MAIN
userName
“Bob”
studentGPA
1.2 Ps
10/4/2019
CSE 1321 Module 1

8. Declaring/Assigning Variables
#include <iostream>
#include <string>
using namespace std;
int main() {
string username;
float gpa;
username = "Bob";
gpa = 1.2f; }
10/4/2019
CSE 1321 Module 1

9. Reading Text from the User
BEGIN MAIN
CREATE userInput
PRINT “Please enter your name”
READ userInput
PRINT “Hello, ” + userInput
END MAIN Ps
10/4/2019
CSE 1321 Module 1

10. Reading Text from the User
#include <iostream>
#include <string>
using namespace std;
int main() {
string userInput;
cout << "Please enter your name: ";
getline (cin, userInput);
cout << "Hello, " << userInput << "!" << endl; }
10/4/2019
CSE 1321 Module 1

11. Reading Numbers from the User
BEGIN MAIN
CREATE userInput
PRINT “Please enter your age: ”
READ userInput
PRINT “You are ” + userInput + “ years old.”
END MAIN Ps
10/4/2019
CSE 1321 Module 1

12. Reading Numbers from the User
#include <iostream>
using namespace std;
int main() {
int age;
cout << "Please enter your age: ";
cin >> age;
cout << "You are " << age << " years old." << endl; }
10/4/2019
CSE 1321 Module 1

13. Note
There are times when reading strings and numbers immediately after one another is problematic. We’ll talk about that later.
10/4/2019
CSE 1321 Module 4