Why is the if Statement does not work?

Question

#include <iostream>

using namespace std;

int main()
{
int m;
int n=1;
int o=2;
int p=3;
int q=4;
cout<<"Type:"<<endl<<endl;
cout<<"1 to sum"<<endl<<endl;
cout<<"2 to subtract"<<endl<<endl;
cout<<"3 to multiplicate"<<endl<<endl;
cout<<"4 to divide"<<endl<<endl;
cin>>m;
if (m==n);
{ //addiction
cout << "Addiction" << endl;
int a;
cout << "Enter the first number"<<endl;
cin >> a;
int b;
cout << "Enter the second Number"<<endl;
cin >> b;
int c=a+b;
cout <<"Acording to Kevin the result is:"<<c<<endl<<endl;
} //addiction
if (m==o);
{ //subtraction
cout << "Subtraction"<<endl;
int d;
cout <<"Enter First number"<<endl;
cin >>d;
int e;
cout <<"Enter second number"<<endl;
cin >> e;
int f=d-e;
cout << "The result is:"<<f<<endl<<endl;
} //subtraction
if (m==p);
{ //Multiplication
cout << "Multiplication"<<endl;
int g;
cout <<"Enter First number"<<endl;
cin >>g;
int h;
cout <<"Enter second number"<<endl;
cin >> h;
int i=g*h;
cout << "The result is:"<<i<<endl<<endl;
} //Multiplication
if (m==q);
{ //Division
cout << "Division"<<endl;
int k;
cout <<"Enter First number"<<endl;
cin >>k;
int l;
cout <<"Enter second number"<<endl;
cin >> l;
int j=k/l;
cout << "The result is:"<<j<<endl;
//Division

return 0;
}
}

This is my attempt to make a calculator.Now as you see in the first cout, I programed to the user put a number and, hopefully it will take you to the desired code.
Example:
If you write 1, It will take you to the addiction part
If you write 2, It will take you to the subtraction part.

But it is not working out.It always shows me the addiction part independently the number I put.Please Help me Sorting out the Problem.

Answer 1

Just tried it now and It worked just perfectly!!

Thanks Naveed Jeelani Khan for the opinion!!

Answer 2

you are terminating" if(m==n);if(m==o);if(m==p);if(m==q);"...remove terminators like
if (m==n)
{
-------
}...
also i think it is better to use else if ladder in your case

Answer 3

there is a syntax error in all ifs . It should be
if ( condition) {body} i.e. no semicolon

Answer 4

ok Thank you