View Compilation Error

0_0_29402409_21540.cpp: In function 'long long int Chinese_remain(int)':
0_0_29402409_21540.cpp:31:23: error: invalid initialization of reference of type 'int&' from expression of type 'long long int'
   d=ex_gcd(mi,m[i],x,y);
                       ^
0_0_29402409_21540.cpp:4:5: note: in passing argument 3 of 'int ex_gcd(int, int, int&, int&)'
 int ex_gcd(int a,int b,int &x,int &y)
     ^