View Compilation Error

0_0_17769365_5205.cpp: In function 'int main()':
0_0_17769365_5205.cpp:39:39: error: too few arguments to function 'int as(int, int)'
                 int s = as(x[i] - x[j]) + as(y[i] - y[j]);
                                       ^
0_0_17769365_5205.cpp:20:5: note: declared here
 int as(int x1,int y1){
     ^
0_0_17769365_5205.cpp:39:57: error: too few arguments to function 'int as(int, int)'
                 int s = as(x[i] - x[j]) + as(y[i] - y[j]);
                                                         ^
0_0_17769365_5205.cpp:20:5: note: declared here
 int as(int x1,int y1){
     ^