#include <iostream>
#using namespace std;

int main(){
	cout << "Hello world" << endl;
	return 0;
}

#include <stdio.h>

int main(){
	printf("Hello world\\n");
	return 0;
}

Input in C++

#include <iostream>
using namespace std;

int main(){
	int value;
	cout << "Enter an integer" << endl;
	cin >> value:
	cout << "the integer is: " << value << end;
	return 0;
}

#include <stdio.h>

int main(){
	int value;
	printf("Enter an integer\\n");
	scanf("%d", &value);
	printf("The integer is: %d\\n", value);
	return 0;
}

Data types in C++

• Integers: can be short(16 bit), int (32 bit), or long (64 bit)
• Real numbers: can be float (7 digits), double (15 digits), or long double (19 digits)
• Characters: char is 1-byte (8 bits)
• Logic: bool (1 bit)
• Arrays: int array[5] = {1, 3, 5, 7, 9};

Strings

• In C, strings were null-terminated character arrays
• In C++, we have a string class
• Creating a string: string courseTitle = “Programming Fundamentals”;
• We can also use some parameters
  • + → concatenate strings
  • == → equal to (used in if/else statements)
  • != → not equal to

#include <iostream>
#strings <string>
using namespace std;

int main(){
	string CourseDept, CourseNum, CourseCode;
	cout << "Enter course department and code:" << endl;
	cin >> CourseDept >> CourseName;
	
	CourseCode = CourseDept + CourseNum;
	if (CourseCode == "ECE244"){
		cout << "That's us!" << endl;
	}
}

Expressions and Statements

• while and do/while loops
• for loops |

Functions