Difference between revisions of "Math"

float G = -9.81;           // create a variable 'G' and set it equal to -9.81
float downForce = abs(G);  // create and set variable 'downForce' to the absolute value of 'G' (9.81)

float param = 0.5;                        // create and set floating point variable 'param' to 0.5
float result = acos(param) * 180.0 / PI;  // create floating point variable 'result' and
                                          // set it equal to the arc-cosine of 'param' in degrees (60)

float param = 0.5;                        // create and set floating point variable 'param' to 0.5
float result = asin(param) * 180.0 / PI;  // create floating point variable 'result' and
                                          // set it equal to the arc-sine of 'param' in degrees (30)

float param = 0.5;                        // create and set floating point variable 'param' to 0.5
float result = asin(param) * 180.0 / PI;  // create floating point variable 'result' and
                                          // set it equal to the arc-sine of 'param' in degrees (26.565)

task main()
{
  string strPI = "3.14";    // string 'strPI' is set equal to "3.14"
  float test = atof(strPI); // convert the string value of 'strPI' to a float and set 'test' to that number (3.14)
  while(true);              // keep the ROBOTC debugger alive so we can see the result
}

task main()
{
  string strPI = "3.14";    // string 'strPI' is set equal to "3.14"
  long test = atoi(strPI);  // convert the string value of 'strPI' to a long and set 'test' to that number (3)
  while(true);              // keep the ROBOTC debugger alive so we can see the result
}

float E = 2.72;           // create a variable 'E' and set it equal to 2.72
float ceiling = ceil(E);  // create and set variable 'ceiling' to the ceiling value of 'E' (3)

float result = cos(PI);  // create a floating point variable 'result' and 
                         // set it equal to the cosine of PI (-1)

float result = cosDegrees(180);  // create a floating point variable 'result' and
                                 // set it equal to the cosine of 180 degrees (-1)

float radiansPerDegree = degreesToRadians(1.0);  // create a floating point variable 'radiansPerDegree ' 
                                                 // and set it equal to the amount of radians in 1.0 degrees (0.017)

float result = exp(4);  // create floating point variable 'result' and 
                        // set it equal to e raised to the 4th power (e^4 = 54.598)

float E = 2.72;              // create a variable 'E' and set it equal to 2.72
float floorValue = ceil(E);  // create and set variable 'floorValue' to the ceiling value of 'E' (2)

float E = 2.72;     // create a variable 'E' and set it equal to 2.72
float ln = log(E);  // create and set variable 'ln' to the natural log of 'E' (1.00)

float E = 2.72;            // create a variable 'E' and set it equal to 2.72
float logBTen = log10(E);  // create and set variable 'logBTen' to the base-10 log of 'E' (0.43)

float y = 0.0;                // create and set 'y' to 0.0
float LCD_width = 100.0;      // create and set 'LCD_width' to 100.0 (width of NXT LCD in pixels)
 
nxtDrawLine(0, 31, 99, 31);   // draw a line across the center of the LCD
 
for(int x = 0; x < 100; x++)  // loop from 0 to 99
{
  y = sin(x * (2.0 * PI) / LCD_width) * 25; // calculate y-coordinate of pixel to draw
  nxtSetPixel(x, y + 31);                   // draw pixel at (x, y+31)
  wait1Msec(100);                           // wait 100 milliseconds
}

float kilobyte = pow(10, 3);  // create floating point variable 'kilobyte' and
                              // set it equal to 10^3 or 1000

float degrees = radiansToDegrees(PI);  // create a floating point variable 'degrees' 
                                       // and set it equal to the amount of degrees in PI (180)

task main()
{
  int min = -100;   // create int variable 'min' and set it to -100
  int max = 100;    // create int variable 'max' and set it to 100
 
  srand(nSysTime);  // generate seed for rand() from current system time
 
  while(true)       // infinite loop:
  {
    motor[rightMotor] = (rand() % (max-min)) + min; // set 'rightMotor' to a random number in the range: [min, max]
    motor[leftMotor]  = (rand() % (max-min)) + min; // set 'leftMotor' to a random number in the range: [min, max]
    wait1Msec(500); // wait 500 milliseconds
  }
}

task main()
{
  long min = -100;   // create long variable 'min' and set it to -100
  long max = 100;    // create long variable 'max' and set it to 100
 
  srand(nSysTime);  // generate seed for rand() from current system time
 
  while(true)       // infinite loop:
  {
    motor[rightMotor] = (randLong() % (max-min)) + min; // set 'rightMotor' to a random number in the range: [min, max]
    motor[leftMotor]  = (randLong() % (max-min)) + min; // set 'leftMotor' to a random number in the range: [min, max]
    wait1Msec(500); // wait 500 milliseconds
  }
}

int res1 = sgn(-9.81);  // returns -1 to 'res1'
int res2 = sgn(3.14);   // returns 1 to 'res2'
int res3 = sgn(0);      // returns 0 to 'res3'

float result = sin(PI);  // create a floating point variable 'result' and
                         // set it equal to the cosine of PI (0)

float result = sinDegrees(180);  // create a floating point variable 'result' and 
                                 // set it equal to the sine of 180 degrees (0)

task main()
{
  int min = -100;   // create int variable 'min' and set it to -100
  int max = 100;    // create int variable 'max' and set it to 100
 
  srand(nSysTime);  // generate seed for rand() from current system time
 
  while(true)       // infinite loop:
  {
    motor[rightMotor] = (rand() % (max-min)) + min; // set 'rightMotor' to a random number in the range: [min, max]
    motor[leftMotor]  = (rand() % (max-min)) + min; // set 'leftMotor' to a random number in the range: [min, max]
    wait1Msec(500); // wait 500 milliseconds
  }
}

float result = sqrt(1764);  // create a floating point variable 'result' and 
                            // set it equal to the square-root of 1764 (42)