f='cos(pi/2*t)*exp(-i*w*t)'; g=int(f,'t',-1,1)
g =
-2*pi*(exp(-i*w)+exp(i*w))/(4*w^2-pi^2)
OldHandle = findobj( \'Name\', \'悲伤\' ) ;if ~isempty(OldHandle),delete(OldHandle) ;end
for Time = \'现在\':\'每一天\':\'永远\',set( gco, \'心情\', \'快乐\');end % 这段代码为你天天快乐而存在