View Compilation Error

0_0_15564784_22862.cpp: In function 'int main()':
0_0_15564784_22862.cpp:14:19: error: invalid initialization of reference of type 'int&' from expression of type 'char'
   if(b<a) swap(a,b);
                   ^
0_0_15564784_22862.cpp:2:6: note: in passing argument 1 of 'void swap(int&, int&)'
 void swap(int &x, int &y)
      ^
0_0_15564784_22862.cpp:15:19: error: invalid initialization of reference of type 'int&' from expression of type 'char'
   if(c<a) swap(a,c);
                   ^
0_0_15564784_22862.cpp:2:6: note: in passing argument 1 of 'void swap(int&, int&)'
 void swap(int &x, int &y)
      ^
0_0_15564784_22862.cpp:16:19: error: invalid initialization of reference of type 'int&' from expression of type 'char'
   if(c<b) swap(b,c);
                   ^
0_0_15564784_22862.cpp:2:6: note: in passing argument 1 of 'void swap(int&, int&)'
 void swap(int &x, int &y)
      ^