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#include <stdio.h>
#include <math.h>
void inputXY(double *x1, double *y1, double *x2, double *y2);
void outputResult(double dist);
double calDistance1(double x1, double y1, double x2, double y2);
void calDistance2(double x1, double y1, double x2, double y2, double *dist);
int main()
{
 double x1, y1, x2, y2, distance=-1;

 inputXY(&x1, &y1, &x2, &y2); // call by reference
 distance = calDistance1(x1, y1, x2, y2); // call by value
 printf("calDistance1(): \n");
 outputResult(distance);
 calDistance2(x1, y1, x2, y2, &distance); // call by reference
 printf("calDistance2(): \n");
 outputResult(distance); // call by value
 return 0;
}
void inputXY(double *x1, double *y1, double *x2, double *y2)
{
 /* Write your code here */
 //Prompt user and then read in the values
 printf("Enter the x1 y1 x2 y2: \n");
 //this data *x1 is already referencing to the memory of the original x1
 // because this is a pointer need to dereference
 scanf("%lf %lf %lf %lf", x1, y1, x2, y2);
 /* OR scanf("%lf %lf %lf %lf", &*x1, &*y1, &*x2, &*y2);

 */

}
void outputResult(double dist)
{
 /* Write your code here */
 //Write a print function
 //Print double in 2 decimal places
 printf("%.2f\n", dist);
}
//Expecting a return of the data tyoe
double calDistance1(double x1, double y1, double x2, double y2)
{
 /* Write your code here */

  double a, b, c, d;
    a = pow((x2 - x1), 2);
    b = pow((y2 - y1), 2);
    d = a+b;
    c = sqrt(d);
    return c;
}
void calDistance2(double x1, double y1, double x2, double y2, double
*dist)
{
 /* Write your code here */
 //pass by reference

 double a, b, c, d;
    a = pow((x2 - x1), 2);
    b = pow((y2 - y1), 2);
    d = a+b;
    c = sqrt(d);
    *dist = c;
}

#include <stdio.h>
#include <math.h>
void inputXY(double *x1, double *y1, double *x2, double *y2);
void outputResult(double dist);
double calDistance1(double x1, double y1, double x2, double y2);
void calDistance2(double x1, double y1, double x2, double y2, double *dist);
int main()
{
 double x1, y1, x2, y2, distance=-1;

 inputXY(&x1, &y1, &x2, &y2); // call by reference
 distance = calDistance1(x1, y1, x2, y2); // call by value
 printf("calDistance1(): \n");
 outputResult(distance);
 calDistance2(x1, y1, x2, y2, &distance); // call by reference
 printf("calDistance2(): \n");
 outputResult(distance); // call by value
 return 0;
}
void inputXY(double *x1, double *y1, double *x2, double *y2)
{
 /* Write your code here */
 //Prompt user and then read in the values
 printf("Enter the number: \n");
 //this data *x1 is already referencing to the memory of the original x1
 scanf("%lf %lf %lf %lf", &*x1, &*y1, &*x2, &*y2); // because this is a pointer need to dereference
 printf("%lf %lf %lf %lf\n", *x1, *y1, *x2, *y2);
}
void outputResult(double dist)
{
 /* Write your code here */
 //Write a print function
 printf("%lf\n", dist);
}
//Expecting a return of the data tyoe
double calDistance1(double x1, double y1, double x2, double y2)
{
 /* Write your code here */

  double a, b, c, d;
    a = pow((x2 - x1), 2);
    b = pow((y2 - y1), 2);
    d = a+b;
    c = sqrt(d);
    return c;
}
void calDistance2(double x1, double y1, double x2, double y2, double
*dist)
{
 /* Write your code here */
 //pass by reference

 double a, b, c, d;
    a = pow((x2 - x1), 2);
    b = pow((y2 - y1), 2);
    d = a+b;
    c = sqrt(d);
    *dist = c;
}

#include <stdio.h>
#include <math.h>
void inputXY(double *x1, double *y1, double *x2, double *y2);
void outputResult(double dist);
double calDistance1(double x1, double y1, double x2, double y2);
void calDistance2(double x1, double y1, double x2, double y2, double *dist);
int main()
{
 double x1, y1, x2, y2, distance=-1;

 inputXY(&x1, &y1, &x2, &y2); // call by reference
 distance = calDistance1(x1, y1, x2, y2); // call by value
 printf("calDistance1(): \n");
 outputResult(distance);
 calDistance2(x1, y1, x2, y2, &distance); // call by reference
 printf("calDistance2(): \n");
 outputResult(distance); // call by value
 return 0;
}
void inputXY(double *x1, double *y1, double *x2, double *y2)
{
 /* Write your code here */
}
void outputResult(double dist)
{
 /* Write your code here */
}
double calDistance1(double x1, double y1, double x2, double y2)
{
 /* Write your code here */
}
void calDistance2(double x1, double y1, double x2, double y2, double
*dist)
{
 /* Write your code here */
}

#include <stdio.h>
int square1(int num);
void square2(int num, int *result);
int main()
{
 int number, result=0;
 printf("Enter the number: \n");
 scanf("%d", &number);
 printf("square1(): %d\n", square1(number));
 square2(number, &result);
 printf("square2(): %d\n", result);
 return 0;
}
int square1(int num)
{
 /* Write your program code here */
 int i, Sum = 0;
 int sqrt= num * num;
    if(num != 0)
    {
        for(i = 0; i <= sqrt; i++)
      {
        if ( i%2 != 0 && Sum < sqrt)
        {
            Sum = Sum + i;

        }

      }

     return Sum;
    }
      else
        return 0;
}
void square2(int num, int *result)
{
 /* Write your program code here */
int i, Sum = 0;
    int sqrt= num * num;

    if(num != 0)
    {
        for(i = 0; i <= sqrt; i++)
      {
        if ( i%2 != 0 && Sum < sqrt)
        {
            Sum = Sum + i;

        }
      }

     *result = Sum;
    }
      else
        *result = 0;

}

#include <stdio.h>
int digitPos1(int num, int digit);
void digitPos2(int num, int digit, int *result);
int main()
{
 int number, digit, result=0;
 printf("Enter the number: \n");
 scanf("%d", &number);
 printf("Enter the digit: \n");
 scanf("%d", &digit);
 printf("digitPos1(): %d\n", digitPos1(number, digit));
 digitPos2(number, digit, &result);
 printf("digitPos2(): %d\n", result);
 return 0;
}
int digitPos1(int num, int digit)
{
    int totalDigits=1;
 /* Write your program code here */
   while(num!=0){

        if ((num%10) ==digit)
        {
           return totalDigits;
        }
        else
        {
            num = num/10;
        }
     totalDigits ++;
    }
  return 0;
}
void digitPos2(int num, int digit, int *result)
{
 /* Write your program code here */
 int totalDigits=1;
 /* Write your program code here */
   while(num!=0){

        if ((num%10) == digit)
        {
          *result = totalDigits;
          break;
        }
        else
        {
            num = num/10;

        }
     totalDigits ++;
    }
   if (num==0)
        {
            *result = 0;
        }
}

#include <stdio.h>
int numDigits1(int num);
void numDigits2(int num, int *result);
int main()
{
 int number, result=0;

 printf("Enter the number: \n");
 scanf("%d", &number);
 printf("numDigits1(): %d\n", numDigits1(number));
 numDigits2(number, &result);
 printf("numDigits2(): %d\n", result);
 return 0;
}
int numDigits1(int num)
{
    int totalDigits=0;

    while(num!=0){
    num = num/10;
    totalDigits ++;
  }
  return totalDigits;
}
void numDigits2(int num, int *result)
{
 /* Write your program code here */
 int totalDigits=0;

    while(num!=0){
    num = num/10;
    totalDigits ++;
  }

*result = totalDigits;
}