View Compilation Error

0_0_33253219_4255.c: In function 'main':
0_0_33253219_4255.c:23:22: error: called object 'max' is not a function or function pointer
             a[i][j]+=max(a[i+1][j],a[i+1][j+1]);
                      ^
0_0_33253219_4255.c:9:29: note: declared here
     int c,n,i,j,a[105][105],max;
                             ^