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#include<iostream> #include<cmath> using namespace std; int main() { //-------defining variables and initializing them------------- double num1,num2; char operation,redo; //--------Printing my name on screen---------------- cout<<"Welcome to the calculater program v.1.0 written by Your Name"<<endl; cout<<"***************************************************************"<<endl; cout<<endl<<endl<<endl; //--here do loop is used so that the program can be used more then one time //without exiting the run screen--------------------------- do { //----receiving the variables from input-------------- cout<<" Please enter an operation which you like to calculate (+,-,*,/,s)"; cout<<"[s stands for swap]:"; cin>>operation ; cout<<endl<<endl; cout<<" Please enter two numbers to apply your requested operation("; cout<<operation<<"):"<<endl<<"1st num:"; cin>>num1; cout<<"2nd num:" ; cin>>num2; cout<<endl; //---used switch function so thet the operater can be decided------------ switch (operation) { //------calculating the requested equation for inputs------------- //-------at the same time printing the results on screen----------- case'+': cout<<"The addition of two numbers ("<<num1<<","<<num2<<"):"; cout<<num1+num2<<endl; break; case'-': cout<<"The substraction of two numbers ("<<num1<<","<<num2<<"):"; cout<<num1-num2<<endl; break; case'*': cout<<"The multiplication of two numbers ("<<num1<<","<<num2<<"):"; cout<<num1*num2<<endl; break; case'/': cout<<"The division of two numbers ("<<num1<<","<<num2<<"):"; if(num2==0) { cout<<"not valid"<<endl; } cout<<(num1/num2)<<endl; break; case's': cout<<"The swap of two numbers ("<<num1<<","<<num2<<"):"; swap(num1,num2); cout<<"1stnumber="<<num1<<"and 2nd number="<<num2<<endl<<endl; break; default: cout<<"unknown command"<<endl; } //----now once again the program will ask the user if want to continue or not cout<<"enter y or Y to continue:"; cin>>redo; cout<<endl<<endl; } while(redo=='y'||redo=='Y'); system("pause"); return 0; }
Output
Welcome to the calculater program v.1.0 written by Your Name *************************************************************** Please enter an operation which you like to calculate (+,-,*,/,s)[s stands for swap]:- Please enter two numbers to apply your requested operation(-): 1st num:25 2nd num:20 The substraction of two numbers (25,20):5 enter y or Y to continue:n
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