/********************************************/ /* */ /* September 30, 2013. */ /* Filename: assignment1.GNG1106 */ /* This program performs various operations */ /* for shapes whose parameters are input */ /********************************************/ #include #include #include #define PI 3.141593 int main() //main program { float rad, diam, area, circum, perim, side_a, side_b, height, volume; //Float and integer declarations. Multiple variables with descriptive names were int select_main, select_rect, select_circ, select_cylndr, select_sphere; //used for readability, as opposed to using one or two variables for the calculations. select_main = 0; printf("Welcome! This program helps you learn more about rectangles, circles, cylinders and spheres:" //Welcome screen "by providing descriptions and calculating parameters such as circumference, area, and volume.\n\n"); while(select_main<1 || select_main>5) //Loops while select_main value is anything other than 1,2,3,4 or 5. This allows the user to make indefinite shape selections, { //and avoids ending the program when an erroneous number is selected. printf("Please enter the number corresponding to the shape you would like to investigate or press 5 to terminate program:\n" "\n\t1.Rectangle\n\t2.Circle\n\t3.Cylinder\n\t4.Sphere\n\n\t5.Done\n\nYour selection is: "); scanf("%d", &select_main); switch(select_main) //Shape selection, cases 1 through 4 each relating to a shape, with 5 ending the program. The arithmetic operations are also performed in each case. { case(1): //Rectangle { select_rect = 0; system("cls"); //This command clears the screen. Unfortunately it appears to be unique to Windows. For POSIX use "system(clear);" printf("You have selected the Rectangle. A rectangle is a polygon with four sides, and four right angles." "A rectangle with four sides of equal length is a square. Please input sidelengths a and b, followed " "by the number corresponding to the operation you would like to perform.\n\n"); printf("a = "); scanf("%f", &side_a); printf("\nb = "); scanf("%f", &side_b); printf("\n1.Perimiter\n2.Area\n\nYour selection is: "); while(select_rect<1 || select_rect>2) //Loops while select_rect value is anything other than 1,2. Avoids complications when erroneous integers are entered { scanf("%d", &select_rect); //Reads case selection. 1 for perimeter, 2 for area. switch(select_rect) { case(1): { perim = 2*(side_a+side_b); printf("\nThe perimeter of a rectangle with side lengths %f and %f is: %f\n", side_a, side_b, perim); break; } case(2): { area = side_a*side_b; printf("\nThe area of a rectangle with side lengths %f and %f is: %f\n", side_a, side_b, area); break; } default: printf("Please chose 1 for perimeter or 2 for area.\n"); break; } } } system("PAUSE"); system("cls"); select_main = 0; //Returns to main loop for shape selection after break break; case(2): //Circle { select_circ = 0; system("cls"); //This command clears the screen. Unfortunately it appears to be unique to Windows. For POSIX use "system(clear);" printf("You have selected the Circle. A circle is the set of all points in a plane that are equidistant from a central point." " The distance between any point and this central point is called the 'radius'. Please input a radius length, followed" " by the number corresponding to the operation you would like to perform.\n\n"); printf("radius = "); scanf("%f", &rad); printf("\n1.Circumference\n2.Area\n\nYour selection is: "); while(select_circ<1 || select_circ>2) //Loops while select_rect value is anything other than 1,2. Avoids complications when erroneous integers are entered { scanf("%d", &select_circ); //Reads case selection. 1 for circumference, 2 for area. switch(select_circ) { case(1): { circum = 2*PI*rad; printf("\nThe circumference of a circle with radius %f is: %f\n", rad, circum); break; } case(2): { area = PI*pow(rad,2); printf("\nThe area of a circle with radius %f is: %f\n", rad, area); break; } default: printf("Please chose 1 for circumference or 2 for area.\n"); break; } } } system("PAUSE"); system("cls"); select_main = 0; //Returns to main loop for shape selection after break break; case(3): //Cylinder { select_cylndr = 0; system("cls"); //This command clears the screen. Unfortunately it appears to be unique to Windows. For POSIX use "system(clear);" printf("You have selected the Cylinder. A cylinder is a basic curvilinear shape that is enclosed by the set of all points" " that are equidistant from a central point for a certain length(radius), along an axis, and two planes perpendicular" " to said axis. Please input a radius length and a height, followed by the number corresponding to the operation" " you would like to perform.\n\n"); printf("radius = "); scanf("%f", &rad); printf("height = "); scanf("%f", &height); printf("\n1.Surface Area\n2.Volume\n\nYour selection is: "); while(select_cylndr<1 || select_cylndr>2) //Loops while select_rect value is anything other than 1,2. Avoids complications when erroneous integers are entered { scanf("%d", &select_cylndr); //Reads case selection. 1 for area, 2 for volume. switch(select_cylndr) { case(1): { area = 2*(PI*rad*height); printf("\nThe surface area of a cylinder with radius %f and height %f is: %f\n", rad, height, area); break; } case(2): { volume = PI*pow(rad,2)*height; printf("\nThe volume of a cylinder with radius %f and height %f is: %f\n", rad, height, volume); break; } default: printf("Please chose 1 for surface area or 2 for volume.\n"); break; } } } system("PAUSE"); system("cls"); select_main = 0; //Returns to main loop for shape selection after break break; case(4): //Sphere { select_sphere = 0; system("cls"); //This command clears the screen. Unfortunately it appears to be unique to Windows. For POSIX use "system(clear);" printf("You have selected the Sphere. A Sphere is a circular object in 3-dimensional space that is perfectly round." " Just as a circle is the set of all points that are equidistant from a central point for a certain radius in 2 dimensions," " the same is true for a sphere but in 3 dimensions. The radius for a given sphere is the same as its 2-dimensional analogue." " Please enter a value for the radius, followed by the number corresponding to the operation you would like to perform.\n\n"); printf("radius = "); scanf("%f", &rad); printf("\n1.Surface Area\n2.Volume\n\nYour selection is: "); while(select_sphere<1 || select_sphere>2) //Loops while select_rect value is anything other than 1,2. Avoids complications when erroneous integers are entered { scanf("%d", &select_sphere); //Reads case selection. 1 for surface area, 2 for volume. switch(select_sphere) { case(1): { area = 4*(PI*pow(rad,2)); printf("\nThe surface area of a sphere with radius %f is: %f\n", rad, area); break; } case(2): { volume = 0.75*(PI*pow(rad,3)); printf("\nThe volume of a sphere with radius %f is: %f\n", rad, volume); break; } default: printf("Please chose 1 for surface area or 2 for volume.\n"); break; } } } system("PAUSE"); system("cls"); select_main = 0; //Returns to main loop for shape selection after break break; case(5): //Exit { system("cls"); //Unfortunately this command appears to be unique to Windows. For POSIX use "system(clear);" printf("\n**Thanks! Goodbye.**\n"); break; } default: system("cls"); printf("**Please choose an integer from 1 to 5!**\n\n"); break; } } system("PAUSE"); return 0; }