Simple C++ Program. #include <iostream> using namespace std; int main() { //Note cout << Hello World << endl; return 0;
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1 Programming Review
2 Simple C++ Program cout << Hello World << endl;
3 Variables gpa = 4.0;
4 Formatting gpa = 4.0;
5 Conditionals gpa = 4.0; cout << Letter Grade is cout << an A ; cout << not A ;
6 Control Structures times = 3; gpa = 4.0; cout << Letter Grade is ; cout << an A ; cout << not A ; cout <<! ;
7 Functions double calculategpa() return 4.0; times = 3; gpa = calculategpa(); cout << Letter Grade is ; cout << an A ; cout << not A ; cout <<! ;
8 times = 3; gpa = calculategpa(); Function Overloading cout << Letter Grade is ; cout << an A ; cout << not A ; cout <<! ; double calculategpa() return 4.0; double calculategpa(double g1) return g1; double calculategpa(double g1, double g2) return (g1 + g2) / 2.0;
9 Default Function Parameters times = 3; gpa = calculategpa(); double calculategpa(double g1 = 4.0) return g1; double calculategpa(double g1, double g2) return (g1 + g2) / 2.0; cout << Letter Grade is ; cout << an A ; cout << not A ; cout <<! ;
10 Pass By Reference gpa = calculategpa(×); double calculategpa(int& times, double g1 = 4.0) times = 1; return g1; double calculategpa(int times, double g1, double g2) times = 2; return (g1 + g2) / 2; cout << Letter Grade is ; cout << an A ; cout << not A ; cout <<! ;
11 Random Number Generation #include <cstdlib> #include <ctime> srand(time(0)); gpa = calculategpa(×); double calculategpa(int& times, double g1 = 4.0) times = rand() % 10; return g1; double calculategpa(int times, double g1, double g2) times = (rand() % 10) + 1; return (g1 + g2) / 2; cout << Letter Grade is ; cout << an A ; cout << not A ; cout <<! ;
12 #include <cstdlib> #include <ctime> #include <fstream> ofstream output; srand(time(0)); gpa = calculategpa(×); output.open( gpa.txt ); File I/O double calculategpa(int& times, double g1 = 4.0) times = rand() % 10; return g1; double calculategpa(int times, double g1, double g2) times = (rand() % 10) + 1; return (g1 + g2) / 2; output << fixed << showpoint << setprecision(2); output << GPA: << gpa << \n ; output << Letter Grade is ; output << an A ; output << not A ; output <<! ; output.close();
13 #include <cstdlib> #include <ctime> #include <fstream> ofstream output; srand(time(0)); gpa = calculategpa(×); output.open( gpa.txt ); Arrays double calculategpa(int& times, double g1 = 4.0) times = rand() % 10; return g1; double calculategpa(int times, double g1, double g2) times = (rand() % 10) + 1; return (g1 + g2) / 2; output << fixed << showpoint << setprecision(2); output << GPA: << gpa << \n ; output << Letter Grade is ; output << an A ; output << not A ; output <<! ; double calculategpa(double grades[], int number) double ret = 0.0; for (int i = 0; i < number; i++) ret += grades[i]; ret /= number; return ret; output.close();
14 #include <cstdlib> #include <ctime> #include <fstream> int *times; ofstream output; srand(time(0)); times = new int; gpa = calculategpa(times); output.open( gpa.txt ); Pointers and Memory Allocation double calculategpa(int* times, double g1 = 4.0) *times = rand() % 10; return g1; double calculategpa(int times, double g1, double g2) times = (rand() % 10) + 1; return (g1 + g2) / 2; output << fixed << showpoint << setprecision(2); output << GPA: << gpa << \n ; output << Letter Grade is ; output << an A ; output << not A ; for (int i = 0; i < *times; i++) output <<! ; output.close(); delete times; double calculategpa(double grades[], int number) double ret = 0.0; for (int i = 0; i < number; i++) ret += grades[i]; ret /= number; return ret;
15 Need More? Professor Myers' COP3014 lecture notes: +/notes/index3014.html
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