wanna ask about string and converting it into float

[Maria123]

i need to write a code that accepts string form user like this {1 2 3 ; 1 2 3}
and then make a function that converts this string into float to put it in an array as a matrix and make operations on it ... could you help me please what to do ?

[weaknessforcats]

Are you using C or C++?

[Maria123]

i'm using c++ ..........

[weaknessforcats]

Then you should be using a stringstream for this:

string input("{123;456}");
    stringstream str;
    char junk;
    float a;
    float b;
 
    str << input;
 
    str >> junk >> a >> junk >> b >> junk;

Here you capture your input in a C++ string. Then you insert the string into a stringstream object. These stringstream objects contain a string but operate like a stream (like cin/cout).

On the input is inserted you extract it using a variable (junk) to hold the {. Then extract the first float. Then use junk again to hold the ;. Then extract the second float. Then use junk again to hold the }.

[RabahMabhoul]

//Input request ! you will get a string in the variable
getline(cin,variable);

//with stod() you can turn a string to a float or double.
float variable_that_will_hold_the_numerical_value = stod(variable);
//I hope it helps you!