#include <stdio.h>#include <conio.h>#include <math.h>#include <string.h>char result[20]; // declares character string resultint type; int first = 0;float mainhold;float maincur;int end = 0;char yesno[10];int quit = 0;char Y[] = "Y";char Yes[] = "Yes";char YES[] = "YES";char yes[] = "yes";char y[] = "y";char N[] = "N";char No[] = "No";int main(){void add(){ float sumhold; // declares the variable to hold the current total float sumcur; // declares the variable to hold the next value being added strcpy(result, "Sum"); if (first == 0) { printf(" Enter first number\n"); scanf(" %f", &sumhold ); mainhold = sumhold; first++; } printf(" Enter number to be added\n"); scanf(" %f", &sumcur ); if (first == 0) { mainhold = sumcur + sumhold; } else { mainhold = mainhold + sumcur; } // ends addition section }void sub() { float subhold; // declares the variable to hold the current total float subcur; // declares the variable to hold the next value being added strcpy(result, "Difference"); if (first == 0) { printf(" Enter first number\n"); scanf(" %f", &subhold ); mainhold = subhold; first++; } printf(" Enter number to subtract\n"); scanf(" %f", &subcur ); if (first == 0) { mainhold = subcur - subhold; } else { mainhold = mainhold - subcur; } } // ends subtraction section void mult() { float multhold; // declares the variable to hold the current total float multcur; // declares the variable to hold the next value being added strcpy(result, "Product"); if (first == 0) { printf(" Enter first number\n"); scanf(" %f", &multhold ); mainhold = multhold; first++; } printf(" Enter number to be multiplied\n"); scanf(" %f", &multcur ); if (first == 0) { mainhold = multcur * multhold; } else { mainhold = mainhold * multcur; } } // ends multiplication section void div(){ float divhold; // declares the variable to hold the current total float divcur; // declares the variable to hold the next value being added strcpy(result, "Quotient"); if (first == 0) { printf(" Enter first number\n"); scanf(" %f", &divhold ); mainhold = divhold; first++; } printf(" Enter number to divide by\n"); scanf(" %f", &divcur ); if (divcur != 0) { if (first == 0) { mainhold = divcur / divhold; } else { mainhold = mainhold / divcur; } } else { printf(" Can not divide by zero\n"); printf(" Press any key to continue\n\n"); getch(); // How I set it to clear everything without using a goto? } } // ends division section void root() { float roothold; // declares the variable to hold the current total float rootcur; // declares the variable to hold the next value being added strcpy(result, "Square root"); if (first == 0) { printf(" Enter first number\n"); scanf(" %f", &roothold ); mainhold = roothold; first++; } if (first == 0) { mainhold = sqrt(roothold); } else { mainhold = sqrt(mainhold); } } // ends square root sectionvoid expo(){float expa;float base;float expaend;int expcount; printf( "Enter numerical base\n"); /* asks user to enter numerical base */ scanf(" %f", &base); /* assigns the variable "base" a value */ printf( "Enter numerical exponant\n"); /* requests value of exponant */ scanf(" %f", &expa); /* assigns the variable "expa" a value */ if ((expa == 0) || (expa == 1)) /* deals with exponants one and zero */ { if (expa == 0) /* deals with something to the zero power */ { (expaend = 1); /* assigns "basenot" to the zero power as having the value of one */ } else { (expaend = base); /* assigns "base" to the first power a value of itself */ } } else { (expaend = base); /* starts end at the value of base */ for (expcount = 2; expcount <= expa; expcount++) /* from 2 = expcount <= expa, do a loop */ { expaend = (expaend * base); } } printf( "%f to the %f power is %f\n", base, expa, expaend); mainhold = expaend; } // ends exponant sectionwhile (quit == 0){while (end == 0) // begins the main while statement{ printf(" Type the number that matches the type of calcuation\n "); printf(" 1 Addition\n "); printf(" 2 Subtraction\n "); printf(" 3 Multiplication\n "); printf(" 4 Division\n "); printf(" 5 Square Root\n "); printf(" 6 Exponants\n "); printf(" 7 Fractional Exponants\n "); printf(" 8 Exit Program\n "); // Don't forget to change the quit value when adding additional features scanf(" %d", &type ); if (type == 1) { add(); } // ends adddition section if (type == 2){ sub();} if (type == 3) { mult(); } if (type == 4) { div(); } if (type == 5) { root(); } if (type == 6) // begins exponant section { expo(); } if (type == 8) // begins quit section { end++; quit++; } // ends quit section if ((type >= 1 && type <= 3) || (type >= 5 && type <= 7)) // Don't forget to modify this when adding additional features { if ((type >= 1 && type <= 3) || (type <= 5)) // Don't forget to modify this when adding additional features { printf(" %s is %f\n", result, mainhold); // prints result for any of the first five except division } printf(" Perform additional operation to current number? (Y/N)\n"); scanf(" %s", &yesno ); if ((strcasecmp (yesno,N) == 0) || (strcasecmp (yesno,No) == 0)) { end++; } } } //ends main while statement end--; first = 0; } // ends final while statement return 0; }