Windows 7, Visual Studio 2010, C++ int main() { float x,y; do{ cout<<endl; cout<<"Please enter a number greater than 3 and less than 9 ";cin>>x; if(x<3 || x>9) cout<<"ERROR"<<endl; }while(x<3 || x>9); more code for y.... *********************** Above code works fine for float x ; Want to trap error if x is ALPHA. How???? (I haven't coded in a while)
You would have to read the input into a string variable, then check if it's a valid number with a function like atoi(), and if not, throw a suitable error. Code: char buf[32]; fgets(buf,30,stdin); // order of params might be wrong int num=atoi(buf); if (num<3 || num>9) printf("Wrong\n");
Thank you...good start... need: float num=ATOF(buf);..... Now working.... Really like this forum...Thanks again...