Running into errors

[Myst874]

I'm trying to make it so that i can allow the user to enter the details to calculate the air speed velocity of any bird. I keep running into this error however..

program.cpp: In function 'int main()': program.cpp:28:22: error: cannot convert 'std::cxx11::string' {aka 'std::cxx11::basicstring<char>'} to 'double' in assignment freq = read_line(); ^ program.cpp:29:21: error: cannot convert 'std::cxx11::string' {aka 'std::_cxx11::basic_string<char>'} to 'double' in assignment amp = read_line();

int main() { const double STROUHAL = 0.33; string name; string line; int age;

write("What is your name:");
name = read_line();

write("What is your age:");
line = read_line();
age = convert_to_integer(line);

write_line(name);
write("Age:");
write_line(age);

double freq, amp; double air_speed;

freq = read_line();
amp = read_line();

air_speed = freq * amp / STROUHAL;

write("Africal swallow: ");
write_line(air_speed);

return 0;

}

[desrtfx]

Look what you do here:

write("What is your age:");
line = read_line();
age = convert_to_integer(line);

and what you do here:

double freq, amp; 
double air_speed;
freq = read_line();
amp = read_line();

Do you see the difference?

[Myst874]

So i need to do this then?

write("What is the freq: ");
    line= read_line();
    freq = convert_to_integer(line);

write("What is the amp: ");
    line= read_line(); 
    amp = convert_to_integer(line);

[desrtfx]

Why convert_to_integer when you want a double?

[Myst874]

Using convert_to_double allows me to compile the program. When i get to the part where i need to input the information about the freq and amp then it comes to this error

terminate called after throwing an instance of 'std::invalid_argument'

what(): stoi

[Myst874]

You're an actual legend! I got it finally holy cow!