Problem with output of fprintf command

Question

Craig Johnson 2022-7-30

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1771245-problem-with-output-of-fprintf-command

评论： Steven Lord 2022-7-31

采纳的回答： Cris LaPierre

function input(x)

Fw=0;

Fg=-12.9;

Bw=100;

Bg=197;

F=Fw+x*(Fg-Fw);

B=Bw+x*(Bg-Bw);

XX=x*100;

Line1_1='For an aqueous mixture of ';

Line1_2='glycol';

Line2_1='the freezing point is ';

Line2_2='Celcius and';

Line3_1='the boiling point is ';

Line3_2='Celcius';

fprintf(Line1_1 ,XX,Line1_2)

fprintf(Line2_1 ,F,Line2_2)

fprintf(Line3_1 ,B,Line3_2)

end

output: For an aqueous mixture of the freezing point is the boiling point is >>

Why is my function not including XX,B, and F in the output even though they are included in the fprintf functions? Just trying to figure out what code I'm missing to get the output to work correctly

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Steven Lord 2022-7-31

In addition to the feedback about format specifiers in your fprintf calls that others have given you, I want to recommend that you change the name of your function because input already has a meaning in MATLAB.

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Answer 1

Cris LaPierre 2022-7-30

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1771245-problem-with-output-of-fprintf-command#answer_1018325

在 MATLAB Online 中打开

Look at the examples for fprintf in the documentation. You need to include a format specification to include variable values.

x = 2.5;
input(x)
For an aqueous mixture of 250 glycol the freezing point is -32.25 Celcius and the boiling point is 342.5 Celcius 
function input(x)
Fw=0;
Fg=-12.9;
Bw=100;
Bg=197;
F=Fw+x*(Fg-Fw);
B=Bw+x*(Bg-Bw);
XX=x*100;
Line1_1='For an aqueous mixture of %g ';
Line1_2='glycol ';
Line2_1='the freezing point is %g ';
Line2_2='Celcius and ';
Line3_1='the boiling point is %g ';
Line3_2='Celcius ';
fprintf([Line1_1, Line1_2], XX)
fprintf([Line2_1,Line2_2], F)  
fprintf([Line3_1,Line3_2], B)
end