User Defined Legend Input

How do I display my input (tC1, tC2) in the legend? I want the numerical value of whatever input is used, not the name tC1,tC2. This is my script

tC1=input('Enter the first temperature in °C:');

tC2=input('Enter the second temperature in °C:');

tK1=(tC1)+(273.15);

tK2=(tC2)+(273.15);

n=1;

R=8.314;

v=0:1:1000;

pkPa1=(n*R*tK1)./v;

pkPa2=(n*R*tK2)./v;

semilogx(v,pkPa1)

ylim([0 1000])

hold on;

semilogx(v,pkPa2,'--r')

ylim([0 1000])

grid on;

title('Title');

xlabel('Volume');

ylabel('Pressure');

legend(tC1,tC2);<----This is where my problem is

Answer 1

[Walter Roberson]

legend( num2str(tC1), num2str(tC2) )

[Recep Kurtulus]

thx