I'm working on an assignment with equations, but I can't figure out how to input the different parts of the equation.
The equation is always formatted:
An example: 2.5y+4.7x+7z=46
To accomplish this, I tried using four double variables and six character variables.
so that the equation splits into the variables a b c d e f g h i, which I can then manipulate.
If there were whitespaces anywhere in the equation, I could have used istringstream to split them, but there aren't. I am not allowed to change the input file.
How can I put the numbers in doubles, and the letters/symbols in characters?
You can use istringstream and out of stream operator. For example:
std::istringstream iss("2.5y+4.7x+7z=46"); double a,b,c,s; char v1,v2,v3; iss >> a; // read 1st koef iss >> v1; // read 1st var's name iss >> b; // read 2nd koef iss >> v2; // read 2nd var's name iss >> c; // read 3rd koef iss >> v3; // read 3rd var's name iss.ignore(); // skip '=' symbol iss >> s; // read sum
Signs in equation is sign of relevant koefs.