C++ If and if else error messages -

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i making collection of math functions. used if statements create error messages , cut down on user errors.. don't think did right.

string error_0; string error_i;  if (num1 == 0;) {error_0 = "you cannot divide zero. fail."}     else {error_0 = "";}  if (num1=<0;) {error_i = "sorry, can't imaginary numbers."} //for sqroot function     else {error_i = "";}  if (num2=<0;) {error_i = "sorry, can't imaginary numbers."}     else {error_i = "";}

... gives me following error messages in code::blocks compiling.

  • expected ")" before ";" token (the if lines)
  • expected primary expression before ")" token (the if lines)
  • else without previous if (just last else)

i'm new @ c++ , examples have looks correct. appreciated. thanks.

you need semicolon after strings , don't need 1 inside if conditions. also, operator <=, not =<.

string error_0; string error_i;  if (num1 == 0) {error_0 = "you cannot divide zero. fail.";}     else {error_0 = "";}  if (num1 <= 0) {error_i = "sorry, can't imaginary numbers.";} //for sqroot function     else {error_i = "";}  if (num2 <= 0) {error_i = "sorry, can't imaginary numbers.";}     else {error_i = "";}

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