Create calculator.cpp

C++/calculator.cpp

@@ -0,0 +1,99 @@
+#include <iostream>
+#include <string>
+using namespace std;
+
+float add(float a){
+    float sum=a;
+    float b;
+    string c;
+    cout<<"Enter the next numbers to add : ";
+    cin>>b;
+    sum+=b;
+    cout<<"want to add more (y/n) - ";
+    cin>>c;
+    if (c=="y" or c=="Y"){
+        add(sum);
+        return sum;
+    }
+    cout<<"Ans = "<<sum<<endl;
+}
+float sub(float a){
+    float sum=a;
+    float b;
+    string c;
+    cout<<"Enter the next numbers to subtract : ";
+    cin>>b;
+    sum-=b;
+    cout<<"want to subtract more (y/n) - ";
+    cin>>c;
+    if (c=="y" or c=="Y"){
+        sub(sum);
+        return sum;
+    }
+    cout<<"Ans = "<<sum<<endl;
+}
+float multiply(float a){
+    float sum=a;
+    float b;
+    string c;
+    cout<<"Enter the next numbers to multiply : ";
+    cin>>b;
+    sum*=b;
+    cout<<"want to multiply more (y/n) - ";
+    cin>>c;
+    if (c=="y" or c=="Y"){
+        multiply(sum);
+        return sum;
+    }
+    cout<<"Ans = "<<sum<<endl;
+}
+float divide(float a){
+    float sum=a;
+    float b;
+    string c;
+    cout<<"Enter the next numbers to divide : ";
+    cin>>b;
+    sum/=b;
+    cout<<"want to divide more (y/n) - ";
+    cin>>c;
+    if (c=="y" or c=="Y"){
+        divide(sum);
+        return sum;
+    }
+    cout<<"Ans = "<<sum<<endl;
+}
+int main(){
+    while (true){
+        int option;
+        cout<<"Select what operation you want to do -\n1.Addition\n2.Subtraction\n3.Multiplication\n4.Division\n5.Quit\nEnter the number - ";
+        cin>>option;
+        if (option==1){
+            float a;
+            cout<<"Enter the first number : ";
+            cin>>a;
+            add(a);
+        }
+        else if (option==2){
+            float a;
+            cout<<"Enter the first number : ";
+            cin>>a;
+            sub(a);
+        }
+        else if (option==3){
+            float a;
+            cout<<"Enter the first number : ";
+            cin>>a;
+            multiply(a);
+        }
+        else if (option==4){
+            float a;
+            cout<<"Enter the first number : ";
+            cin>>a;
+            divide(a);
+        }
+        else {
+            cout<<"Quit..";
+            break;
+        }
+    }
+}