/*--------------------------------------------------*/ /* Name: Student number: */ /* Date: September 17,2014 */ /* Program:TriangleCalculator */ /* This program takes 4 bands from the */ /*user, through menus and calculates the */ /*resistance value and tolerence. It also shows */ /*the correct unit depending on how */ /*large the entered values are. */ /*--------------------------------------------------*/ #include #include #include #include int main() { //Declare variables int option,terminate=0,counter=1,band1; int firstband,secondband,multiplier,tolerence; float fourthband,tolerencevalue,resistance,thirdbandunit; double thirdband; char ch,*unit1 = "Ohm",*unit2 = "Kilo-Ohm",*unit3 = "Mega-Ohm",*unit4 = "Giga-Ohm",*returnunit; //Display the menu options //This only needs to be dispalyed once, therefore no loop is neccessary start: printf("Please choose an option.\n"); printf("1. Calculate resistance value.\n"); printf("2. Help.\n"); printf("3. Exit.\n"); //Read selected option eneterd by the user scanf("%d", &option); switch(option) {//Main menu statment starts case 1: while(counter<3) //While loop for displying menu in band1 and 2 as values are identical. { //Display the option for all the bands. mainstart: printf("Please select the colours on the bands of your resistor, enter the bracketed letters for your choice\n"); printf("(B)lack\n"); printf("(b)rown\n"); printf("(R)ed\n"); printf("(O)range\n"); printf("(Y)ellow\n"); printf("(G)reen\n"); printf("B(l)ue\n"); printf("(V)iolet\n"); printf("(g)ray\n"); printf("(W)hite\n"); do {//To avoid similair cases, use char inswtead of numerical options ch=getchar(); } while(ch!='B' && ch!='b' && ch!='R' && ch!='O' && ch!='Y' && ch!='G' && ch!='l' && ch!='V' && ch!='g' && ch!='W'); //Declaring all the case values that will be necessary later, this is done through a while assignment adn the getchar() function switch(ch) { case 'B': if (counter==1) { firstband=0; } else { secondband=0; } printf("You chose the color Black\n"); counter++; break; case 'b': if (counter==1) { firstband=10; } else { secondband=1; } printf("You chose the color Brown\n"); counter++; break; case 'R': if (counter==1) { firstband=20; } else { secondband=2; } printf("You chose the color Red\n"); counter++; break; case 'O': if (counter==1) { firstband=30; } else { secondband=3; } printf("You chose the color Orange\n"); counter++; break; case 'Y': if (counter==1) { firstband=40; } else { secondband=4; } printf("You chose the color Yellow\n"); counter++; break; case 'G': if (counter==1) { firstband=50; } else { secondband=5; } printf("You chose the color Black\n"); counter++; break; case 'l': if (counter==1) { firstband=60; } else { secondband=6; } printf("You chose the color Blue\n"); counter++; break; case 'V': if (counter==1) { firstband=70; } else { secondband=7; } printf("You chose the color Violet\n"); counter++; break; case 'g': if (counter==1) { firstband=80; } else { secondband=8; } printf("You chose the color Gray\n"); counter++; break; case 'W': if (counter==1) { firstband=90; } else { secondband=9; } printf("You chose the color White\n"); counter++; break; default: printf("You entered an illegal option.\n"); goto mainstart; break; }//This ends the first two bands }//End of the while-loop printf("\n");//space to visually differentiate the next process start2: //restart menu if wrong input printf("Now to enter the multiplier band M.\n"); printf("\n"); printf("1.Black\n"); printf("2.Brown\n"); printf("3.Red\n"); printf("4.Orange\n"); printf("5.Yellow\n"); printf("6.Green\n"); printf("7.Blue\n"); printf("8.Violet\n"); printf("9.Gray\n"); printf("10.White\n"); printf("11.Gold\n"); printf("12.Silver\n"); scanf("%d", &multiplier); switch(multiplier) { case 1: thirdbandunit = pow(10,0); returnunit = unit1; break; case 2: thirdbandunit = pow(10,1); returnunit = unit1; break; case 3: thirdbandunit = pow(10,2); returnunit = unit1; break; case 4: thirdband = pow(10,3); thirdbandunit = thirdband/pow(10,3); returnunit = unit2; break; case 5: thirdband = pow(10,4); thirdbandunit = thirdband/pow(10,3); returnunit = unit2; break; case 6: thirdband = pow(10,5); thirdbandunit = thirdband/pow(10,3); returnunit = unit2; break; case 7: thirdband = pow(10,6); thirdbandunit = thirdband/pow(10,6); returnunit = unit3; break; case 8: thirdband = 7; thirdband = pow(10,7); thirdbandunit = thirdband/pow(10,6); returnunit = unit3; break; case 9: thirdband = pow(10,8); thirdbandunit = thirdband/pow(10,6); returnunit = unit3; break; case 10: thirdband = pow(10,9); thirdbandunit = thirdband/pow(10,9); returnunit = unit4; break; case 11: thirdbandunit = 0.1; returnunit = unit1; break; case 12: thirdbandunit = 0.01; returnunit = unit1; break; default: printf("Your selection is invalid. Try again.\n"); goto start2; break; } { start3: printf("Select the colour of the tolerence band\n"); printf("1.Gold\n"); printf("2.Silver\n"); scanf("%d", &tolerence); switch(tolerence) { case 1: fourthband = 0.05; break; case 2: fourthband = 0.10; break; default: printf("Your selection is invalid. Try again.\n"); goto start3; break; } } { //Once all values are collected, we must compute the resistance values in this block resistance = (firstband+secondband)*thirdbandunit; tolerencevalue = fourthband*((firstband+secondband)*thirdbandunit); } printf("The resistance value is %.1f +|- %.1f %s\n",resistance,tolerencevalue,returnunit); break; case 2: printf("This program allows a user to select 4 colours for the resistance bands\n of a resisitor and outputs the resistance value in a clean format\n Note: For the first two inputs the user must enter the bracketed letter for their selection, a number is not a valid choice for the first two inputs!\n"); goto start; break; case 3: terminate=1; break; default: printf("Your selection is invalid. Try again.\n"); break; }//Main menu ends { if (terminate==1) exit(0); } return 0; //Exit initializer }//End of main function code