Converting MATLAB to C++ Code Need Help

Is there any way to convert this MATLAB code into C++ in a simple way as possible? Thanks. I am trying to plot a three point running mean.

%Plotting T coordinates which represent the temperature  
%in the vertical 

clear all; 

T=[22 24 16.2 8.4 -0.3 -7.3 -20.3 -37.1 -56.7]; 
H=[0 914 1876 3141 4267 5830 7530 9590 12280]; 
%Plotting H coordinates which represent the height  
%in the vertical 

%3 point running mean 
Tmean = conv(T, ones(1,3)/3);  
Tmean_valid = Tmean(3:end-2);  

Hmean = conv(H,ones(1,3)/3);  
Hmean_valid = Hmean(3:end-2); 

figure(1); 
plot(Tmean_valid,H(2:end-1), ':*r'); 
hold on 
plot(T,H,':*g') 
legend('Running Mean','Temperature Profile') 
title('Temperature Running Mean as function of height') 
xlabel('Temperature(C)') 
ylabel('Height (m)')

[Walter Roberson]

C++ does not have the equivalent of "clear all", or of graphics.