CALL-BY-VALUE(值传递) Under call-by-value, a formal parameter corresponds to the value of an actual parameter. call by-value is the primary parameter passing method in C and Pascal. 传递了实际参数的一个副本给形参。CALL-BY-VALUE（值传递） Under call-by-value, a formal parameter corresponds to the value of an actual parameter. Call￾by-value is the primary parameter￾passing method in C and Pascal. 传递了实际参数的一个副本给形参