//#include <windows.h> // use proper includes for your system
#include <math.h>
#include <gl/Gl.h>
#include <gl/glut.h>
#include <fstream>
#include<string>
#include<iostream>

using namespace std;

//int main() {
//
//
// fstream myFile;
// myFile.open("Brontoi.dat", ios::out);
// if (myFile.is_open()) {
// myFile << "hello";
// myFile.close();
// }
// system("pause>0");
//}


#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glut.h>
#include <fstream>

void drawPolyLineFile(const char* fileName) {

std::ifstream inStream;
inStream.open(fileName); // open the file
if (inStream.fail())
return;

GLint numpolys, numLines, x, y;
inStream >> numpolys; // read the number of polylines
for (int j = 0; j < numpolys; j++) { // read each polyline
inStream >> numLines;
glBegin(GL_LINE_STRIP); // draw the next polyline
for (int i = 0; i < numLines; i++) {
inStream >> x >> y; // read the next x, y pair
glVertex2i(x, y);
}
glEnd();
}
glFlush();
inStream.close();
}

//--------------- setWindow ---------------------
void setWindow(float left, float right, int bottom, int top) {
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(left, right, bottom, top);



}

//---------------- setViewport ------------------
void setViewport(int left, int bottom, int width, int height) {
glViewport(left, bottom, width, height);
}

void render() {

glClear(GL_COLOR_BUFFER_BIT);
setWindow(0, 640.0, 0, 480.0); // set a fixed window

for (int i = 0; i < 1; i++) {
for (int j = 0; j < 10; j++) {
if ((i + j) % 2 == 0) // if (i + j) is even
//setWindow(0.0, 640.0, 0.0, 480.0); // right side up window
//else





setWindow(0.0, 640.0, 480.0, 0.0); // upside down window
glViewport(i * 64, j * 44, 64, 44); // set the next viewport
drawPolyLineFile("dino.dat"); // draw it again setWindow .
}
}
glFlush();

}



int main(int argc, char** argv) {
glutInit(&argc, argv);

glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
glutInitWindowSize(640, 480);
glutInitWindowPosition(0, 0);
glutCreateWindow("FLIP DINOSAUR");

glutDisplayFunc(render);;
glutMainLoop();

return 0;
}
by

C++ Online Compiler

Write, Run & Share C++ code online using OneCompiler's C++ online compiler for free. It's one of the robust, feature-rich online compilers for C++ language, running on the latest version 17. Getting started with the OneCompiler's C++ compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C++ and start coding!

Read inputs from stdin

OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

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

int main() 
{
    string name;
    cout << "Enter name:";
    getline (cin, name);
    cout << "Hello " << name;
    return 0;
}

About C++

C++ is a widely used middle-level programming language.

  • Supports different platforms like Windows, various Linux flavours, MacOS etc
  • C++ supports OOPS concepts like Inheritance, Polymorphism, Encapsulation and Abstraction.
  • Case-sensitive
  • C++ is a compiler based language
  • C++ supports structured programming language
  • C++ provides alot of inbuilt functions and also supports dynamic memory allocation.
  • Like C, C++ also allows you to play with memory using Pointers.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

if(conditional-expression) {
   //code
}
else {
   //code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression){    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
......    
    
default:     
 code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  //code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
// code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
 // code 
} while (condition);

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}