View Compilation Error

0_0_16558165_4834.cpp: In function 'void shusu(int, int*)':
0_0_16558165_4834.cpp:26:22: error: 'su' was not declared in this scope
            if(su(i2+t))
                      ^
0_0_16558165_4834.cpp:44:11: error: 'su' was not declared in this scope
 if(su(i3+t)&&su(i3+1))
           ^