int main (void) {
// Print welcome message
printf("Welcome to the MOTION EQUATION CALCULATOR\n\n");
// Variable for the user choice menu.
int user_choice;
do
{
user_choice = user_menu(); // print menu, validate choice is between 1 and 5
// You will pass the address of this variable to your equation functions.
float result; // Variable to hold calculated result
// Handle menu choice selected by user
switch( user_choice ) {
case 1:
equation1(&result);
break;
case 2:
equation2(&result);
break;
case 3:
equation3(&result);
break;
case 4:
equation4(&result);
break;
case 5:
// exit program if user selected QUIT
printf("Thank you for using the MOTION EQUATION CALCULATOR. Goodbye.\n");
return 0;
break;
}
// Print out the calculated result with four digits after the decimal place
printf("Your result is %.4f.\n\n", result);
} while ( user_choice != 5 );
return 0; // exit with no error
}
void equation3(double *x, double *y, double *z, double a1, double b1, double c1, double d1, double a2, double b2, double c2, double d2, double a3, double b3, double c3, double d3)
{
equation2(x, y, a1 * c2 - a2 * c1, b1 * c2 - b2 * c1, d1 * c2 - d2 * c1, a1 * c3 - a3 * c1, b1 * c3 - b3 * c1, d1 * c3 - d3 * c1);
*z = (d1 - a1 * *x - b1 * *y) / c1;
return;
}
