以下程序的功能是求任意两个整数a和b的最大公约数,并予以显示,程序的划线处入________。#include
long cod(long n1,long n2){long t;while(n2) { ________;n1=n2;n2=t; } return n1;}int main( ){long a,b,x;printf("Please input two numbers:");scanf("%ld%ld",&a,&b);x=cod(a,b);printf("%ld,%ld,%ld\n",a,b,x);}