module1.lst

Programs for the book Advanced Engineering Mathematics using MATLAB, 2ndEd.

listing 1
/*  
   This is a simple C++ program. 
 
   Call this file Sample.cpp. 
*/ 
 
#include <iostream> 
using namespace std; 
 
// A C++ program begins at main(). 
int main() 
{ 
  cout << "C++ is power programming."; 
 
  return 0; 
}

listing 2
// Using a variable. 
 
#include <iostream> 
using namespace std; 
 
int main() 
{ 
  int length; // this declares a variable 
 
  length = 7; // this assigns 7 to length 
 
  cout << "The length is "; 
  cout << length; // This displays 7 
 
  return 0; 
}

listing 3
// Using an operator.  
  
#include <iostream>  
using namespace std;  
  
int main()  
{  
  int length; // this declares a variable  
  int width;  // this declares another variable  
  int area;   // this does, too 
 
  length = 7; // this assigns 7 to length  
  width = 5;  // this assigns 5 to width  
  
  area = length * width; // compute area 
 
  cout << "The area is ";  
  cout << area; // This displays 35 
  
  return 0;  
}

listing 4
// A simplified version of the area program. 
  
#include <iostream>  
using namespace std;  
  
int main()  
{  
  int length; // this declares a variable  
  int width;  // this declares another variable  
  
  length = 7; // this assigns 7 to length  
  width = 5;  // this assigns 5 to width  
  
  cout << "The area is ";  
  cout << length * width; // This displays 35 
  
  return 0;  
}

listing 5
/* 
   An interactive program that computes 
   the area of a rectangle. 
*/ 
  
#include <iostream>  
using namespace std;  
  
int main()  
{  
  int length; // this declares a variable  
  int width;  // this declares another variable  
  
  cout << "Enter the length: "; 
  cin >> length; // input the length 
 
  cout << "Enter the width: "; 
  cin >> width;  // input the width  
  
  cout << "The area is ";  
  cout << length * width; // display the area 
  
  return 0;  
}

listing 6
/*
   This program demonstrates the \n code, which 
   generates a new line. 
*/ 
#include <iostream> 
using namespace std; 
 
int main() 
{ 
  cout << "one\n"; 
  cout << "two\n"; 
  cout << "three"; 
  cout << "four"; 
 
  return 0; 
}

listing 7
/*  
   This program illustrates the differences 
   between int and double. 
*/  
 
#include <iostream>  
using namespace std; 
 
int main() {  
  int ivar;    // this declares an int variable 
  double dvar; // this declares a floating-point variable 
 
  ivar = 100; // assign ivar the value 100 
    
  dvar = 100.0; // assign dvar the value 100.0 
 
  cout << "Original value of ivar: " << ivar << "\n"; 
  cout << "Original value of dvar: " << dvar << "\n"; 
 
  cout << "\n"; // print a blank line 
 
  // now, divide both by 3 
  ivar = ivar / 3;  
  dvar = dvar / 3.0; 
 
  cout << "ivar after division: " << ivar << "\n"; 
  cout << "dvar after division: " << dvar << "\n"; 
 
  return 0; 
}

listing 8
/*   
   Project 1-1  
  
   This program converts feet to meters.  
  
   Call this program FtoM.cpp.  
*/  
  
#include <iostream>  
using namespace std;  
  
int main() {   
  double f; // holds the length in feet  
  double m; // holds the conversion to meters  
  
  cout << "Enter the length in feet: "; 
  cin >> f; // read the number of feet   
  
  m = f / 3.28; // convert to meters 
  cout << f << " feet is " << m << " meters.";  
 
  return 0; 
}

listing 9
// Demonstrate the if.  
 
#include <iostream> 
using namespace std; 
  
int main() {  
  int a, b, c;  
  
  a = 2;  
  b = 3;  
  
  if(a < b) cout << "a is less than b\n"; 
 
  // this won't display anything  
  if(a == b) cout << "you won't see this\n";  
 
  cout << "\n"; 
 
  c = a - b; // c contains -1 
 
  cout << "c contains -1\n"; 
  if(c >= 0) cout << "c is non-negative\n"; 
  if(c < 0) cout << "c is negative\n"; 
 
  cout << "\n"; 
 
  c = b - a; // c now contains 1 
  cout << "c contains 1\n"; 
  if(c >= 0) cout << "c is non-negative\n"; 
  if(c < 0) cout << "c is negative\n"; 
 
  return 0; 
} 


listing 10
// A program that illustrates the for loop. 
 
#include <iostream> 
using namespace std; 
 
int main() 
{ 
  int count; 
 
  for(count=1; count <= 100; count=count+1)  
    cout << count << " "; 
 
  return 0; 
}

listing 11
// Demonstrate a block of code. 
 
#include <iostream> 
using namespace std; 
 
int main() { 
  double result, n, d; 
 
  cout << "Enter value: "; 
  cin >> n; 
 
  cout << "Enter divisor: "; 
  cin >> d; 
 
  // the target of this if is a block 
  if(d != 0) { 
    cout << "d does not equal zero so division is OK" << "\n"; 
    result = n / d; 
    cout << n << " / " << d << " is " << result; 
  } 
 
  return 0; 
}

listing 12
/*   
   Project 1-2  
  
   This program displays a conversion table of feet to meters.  
  
   Call this program FtoMTable.cpp.  
*/  
  
#include <iostream>  
using namespace std;  
  
int main() {   
  double f; // holds the length in feet  
  double m; // holds the conversion to meters  
  int counter; 
 
  counter = 0; 
 
  for(f = 1.0; f <= 100.0; f++) { 
    m = f / 3.28; // convert to meters 
    cout << f << " feet is " << m << " meters.\n";  
     
    counter++;  
 
    // every 10th line, print a blank line 
    if(counter == 10) { 
      cout << "\n"; // output a blank line 
      counter = 0; // reset the line counter 
    } 
  } 
 
  return 0; 
}

listing 13
// Use the abs() function. 
 
#include <iostream> 
#include <cstdlib>  
using namespace std; 
 
int main() 
{ 
  int result; 
 
  result = abs(-10); 
 
  cout << result; 
 
  return 0; 
}