本程序所求解的方程为x-cosx=0的解，程序将f(x)定义为子函数过程f(x)，并把初值赋给相应变量后，即可使用xj(a,b,n)调用快带弦截法子函数。-the procedure for solving the equation x-cosx = 0 solution procedures to f (x) is defined as the process of Functions f (x), and initial value assigned to the corresponding variables, in order to use xj (a, b, n) calls quick way to bring xianjie function.