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。请将程序补充完整。 #include< stdio.h> #include< stdlib.h> long codivisor(long n1 ,long n2 ) { long t ; while( n2 !=0 ) {________; n1 = n2 ; n2 = t ;} return ________; } main() { long a , b , x ; printf ( "please input two numbers:" ); scanf ( "%ld%ld" ,& a ,& b ); x =codivisor( a , b ); printf ( "maximum common divisor of %ld and %ld is : %ld\n" , a , b , x ); }