| | \n\n \n \n \n float gamma=0.75 | \tstrength of external force \n | \n \n\n \n \n \n float kxi=1 | \tadjustment for input signal \n | \n \n\n \n \n \n float omega=1 | \tangular frequence of external force \n | \n \n\n \n \n \n int pow1=1 | \tpower of first non-linear restitution term \n | \n \n\n \n \n \n int pow2=3 | \tpower of second non-linear restitution term \n | \n \n\n \n \n \n bool ricker=n [y/n] | \tif y need extenal input for external force \n | \n \n\n \n \n \n string sfile= | \tauxiliary input file name \n | \n \n\n \n \n \n bool verb=n [y/n] | \tverbosity flag \n | \n \n\n \n \n \n float x0=0 | \tinitial value of x0 \n | \n \n\n \n \n \n float y0=0 | \tinitial value of y0 \n | \n \n |