View Compilation Error

0_0_20297784_1848.cpp: In function 'int dfs2(int, int, char)':
0_0_20297784_1848.cpp:40:49: error: too few arguments to function 'int dfs2(int, int, char)'
         if (ma[tx][ty] == ch) ret += dfs2(tx, ty);
                                                 ^
0_0_20297784_1848.cpp:33:5: note: declared here
 int dfs2(int x, int y, char ch) {
     ^