Code:#include <stdio.h> #include <stdlib.h> #include <math.h> int main() { char c1, c2, c3, c4, c5, c6, choicenew; int choiceRs; float RsP,Rs3,Rs2,Rs1,choiceSP3,choiceSP2,choiceSP1,choiceSP=0,choiceRs3,choiceRs2,choiceRs1,rone3,rone2,rone1,rtwo3,rtwo2,rtwo1,rthree3,rthree2,rthree1; printf("-----------------------------------------------------------------------------------------------------------------------\n"); printf("Project Done By:123\nProject Title: Resistance Calculator\n"); printf("-----------------------------------------------------------------------------------------------------------------------\n"); start: printf("Enter 6 secret Number(PASSWORD): \n"); c1 = getch(); putchar('*'); c2 = getch(); putchar('*'); c3 = getch(); putchar('*'); c4 = getch(); putchar('*'); c5 = getch(); putchar('*'); c6 = getch(); putchar('*'); if (c1 == '1' && c2 == '2' && c3 == '3' && c4 == '4' && c5 == '5' && c6 == '6') { printf("\nWelcome to Equivalent Resistance Calculator!!! \n"); printf("\nYou're advised to Calculate 3 times for proper Summary\n"); } else { printf("\n You have entered wrong Password!\n"); goto start; } /* printf("\nSshhh!! Secret letters you typed are: %c%c%c%c%c%C", c1, c2, c3, c4, c5, c6);*/ select: printf("\nSelect Either Series or Parallel Circuit\n"); printf("\nPress 1 for Series Circuit \nPress 2 for Parallel Circuit\n "); { int choiceSP, i; float r[3] , RsS = 0; start2: scanf("%d",&choiceSP); choiceSP3=choiceSP2; choiceSP2=choiceSP1; choiceSP1=choiceSP; switch (choiceSP) { case 1 : printf("You have chosen *Series Circuit* "); { printf("\nEnter the number of Resistors in your circuit:\n "); printf("\nPress 1 for 2 Resistors \nPress 2 for 3 Resistors \n "); int choiceRs; start3: scanf("%d",&choiceRs); choiceRs3=choiceRs2; choiceRs2=choiceRs1; choiceRs1=choiceRs; switch (choiceRs) { case 1 : printf("\nYou have chosen *2 Resistors*"); { { printf("\nEnter Value of Each Resistor (in Ohm) : \n"); for (i = 0; i < 2; i++) { printf("\nR%d : ", i + 1); scanf("%f", &r[i]); rone3=rone2; rone2=rone1; rone1=r[0]; rtwo3=rtwo2; rtwo2=rtwo1; rtwo1=r[1]; rthree3=rthree2; rthree2=rthree1; rthree1=r[2]; } for (i = 0; i < 2; i++) { RsS = RsS + r[i]; } printf("\nEquivalent Series Resistance = %.4f Ohm", RsS); Rs3=Rs2; Rs2=Rs1; Rs1=RsS; getch(); system("CLS"); YN1 : { printf("\nDo you want to calculate a new one?\n"); printf("\nPress Y for *Yes* and N for *No* (End Program after showing summary)\n"); fflush(stdin); scanf("%c", &choicenew); system("CLS"); { if (choicenew == 'Y' || choicenew == 'y') { goto select; } else if (choicenew == 'N' || choicenew == 'n') { goto summary; break; } else if (choicenew != 'Y' || choicenew != 'y' || choicenew != 'N' || choicenew != 'n') { printf("Please choose either Y or N"); goto YN1; } } } } break; case 2 : printf("\nYou have chosen *3 Resistors*"); { { printf("\nEnter Value of Each Resistor (in Ohm) : \n"); for (i = 0; i < 3; i++) { printf("\nR%d : ", i + 1); scanf("%f", &r[i]); rone3=rone2; rone2=rone1; rone1=r[0]; rtwo3=rtwo2; rtwo2=rtwo1; rtwo1=r[1]; rthree3=rthree2; rthree2=rthree1; rthree1=r[2]; } for (i = 0; i < 3; i++) { RsS = RsS + r[i]; } printf("\nEquivalent Series Resistance = %.4f Ohm", RsS); Rs3=Rs2; Rs2=Rs1; Rs1=RsS; getch(); system("CLS"); YN2 : { printf("\nDo you want to calculate a new one?\n"); printf("\nPress Y for *Yes* and *N* for No (End Program after showing summary) \n"); fflush(stdin); scanf("%c", &choicenew); system("CLS"); if (choicenew == 'Y' || choicenew == 'y') { goto select; } else if (choicenew == 'N' || choicenew == 'n') { goto summary; break; } else { printf("Please choose either Y or N"); goto YN2; } } } } break; default: printf("Sorry you are only allowed to choose either 2 or 3 resistors\n"); goto start3; break; } } break; case 2 : printf("You have chosen *Parallel Circuit*"); float RsP = 0, invRsP = 0; { printf("\nEnter the number of Resistors in your circuit:\n "); printf("\nPress 1 for 2 Resistors \nPress 2 for 3 Resistors \n "); int choiceRs; start4: scanf("%d",&choiceRs); choiceRs3=choiceRs2; choiceRs2=choiceRs1; choiceRs1=choiceRs; switch (choiceRs) { case 1 : printf("\nYou have chosen *2 Resistors*"); /*float r[10];*/ { { printf("\nEnter Value of Each Resistor (in Ohm) : n"); for (i = 0; i < 2; i++) { printf("\n R%d : ", i + 1); scanf("%f", &r[i]); rone3=rone2; rone2=rone1; rone1=r[0]; rtwo3=rtwo2; rtwo2=rtwo1; rtwo1=r[1]; rthree3=rthree2; rthree2=rthree1; rthree1=r[2]; } for (i = 0; i < 2; i++) { invRsP+=(1.0/r[i]); } RsP=(1.0/invRsP); } printf("\nEquivalent Parallel Resistance = %.4f Ohm", RsP); Rs3=Rs2; Rs2=Rs1; Rs1=RsP; getch(); system("CLS"); YN3: { printf("\nDo you want to calculate a new one?\n"); printf("\nPress Y for *Yes* and N for *No* (End Program after showing summary)\n"); fflush(stdin); scanf("%c", &choicenew); system("CLS"); if (choicenew == 'Y' || choicenew == 'y') { goto select; } else if (choicenew == 'N' || choicenew == 'n') { goto summary; break; } else { printf("Please choose either Y or N"); goto YN3; } } } break; case 2 : printf("\nYou have chosen *3 Resistors*"); { { printf("\nEnter Value of Each Resistor (in Ohm) : \n"); for (i = 0; i < 3; i++) { printf("\n R%d : ", i + 1); scanf("%f", &r[i]); rone3=rone2; rone2=rone1; rone1=r[0]; rtwo3=rtwo2; rtwo2=rtwo1; rtwo1=r[1]; rthree3=rthree2; rthree2=rthree1; rthree1=r[2]; } for (i = 0; i < 3; i++) { invRsP+=(1.0/r[i]); } RsP=(1.0/invRsP); } printf("\nEquivalent Parallel Resistance = %.4f Ohm", RsP); Rs3=Rs2; Rs2=Rs1; Rs1=RsP; getch(); system("CLS"); YN4: { printf("Do you want to calculate a new one?"); printf("\nPress Y for *Yes* and N for *No* (End Program after showing summary)\n"); fflush(stdin); scanf("%c", &choicenew); system("CLS"); if (choicenew == 'Y' || choicenew == 'y') { goto select; } else if (choicenew == 'N' || choicenew == 'n') { goto summary; break; } else { printf("Please choose either Y or N"); goto YN4; } } } break; default: printf("Sorry you are only allowed to choose either 2 or 3 resistors\n"); goto start4; break; } } default: printf("Sorry please choose either 1 or 2 \n"); goto start2; break; } summary: system("COLOR CF"); printf("---------------------------------------------------------------------------------------------------------------------"); printf("\nTake Note :"); printf("\n\nCircuit type:\n1 = Series Circuit &\n2 = Parallel Circuit\n\n"); printf("\nCalculation 1 is the latest while Calculation 3 was the earliest"); printf("\n---------------------------------------------------------------------------------------------------------------------\n"); printf("\nCalculation 1 : Equivalent Resistance = %.4f Ohm You chose Circuit type %.f and %.f Resistors \nR1=%.f, R2=%.f, R3=%.f\n",Rs1,choiceSP1,choiceRs1 + 1, rone1, rtwo1, rthree1); printf("\nCalculation 2 : Equivalent Resistance = %.4f Ohm You chose Circuit type %.f and %.f Resistors \nR1=%.f, R2=%.f, R3=%.f\n",Rs2,choiceSP2,choiceRs2 + 1, rone2, rtwo2, rthree2); printf("\nCalculation 3 : Equivalent Resistance = %.4f Ohm You chose Circuit type %.f and %.f Resistors \nR1=%.f, R2=%.f, R3=%.f\n",Rs3,choiceSP3,choiceRs3 + 1, rone3, rtwo3, rthree3); printf("\n*********************************************************************************************************************\n"); printf(" THANK YOU!!!! "); printf("*********************************************************************************************************************"); } } }