Question

I am making a collection of math functions. I used if statements to create error messages and cut down on user errors.. I don’t think I did it right.

string error_0;
string error_i;

if (num1 == 0;) {error_0 = "You cannot divide by zero. Fail."}
    else {error_0 = "";}

if (num1=<0;) {error_i = "Sorry, can't do imaginary numbers."} //for sqroot function
    else {error_i = "";}

if (num2=<0;) {error_i = "Sorry, can't do imaginary numbers."}
    else {error_i = "";}

… this gives me the following error messages in code::blocks compiling.

• expected “)” before “;” token (the if lines)
• expected primary expression before “)” token (the if lines)
• else without a previous if (just for the last else)

I’m really new at C++ and from the examples I have everything looks correct. Help would be appreciated. Thanks.

Answer 1

You need a semicolon after your strings and don’t need one inside the if conditions.
Also, the operator is <=, not =<.

string error_0;
string error_i;

if (num1 == 0) {error_0 = "You cannot divide by zero. Fail.";}
    else {error_0 = "";}

if (num1 <= 0) {error_i = "Sorry, can't do imaginary numbers.";} //for sqroot function
    else {error_i = "";}

if (num2 <= 0) {error_i = "Sorry, can't do imaginary numbers.";}
    else {error_i = "";}