View Compilation Error

0_0_30325201_1052.cpp: In function 'int main()':
0_0_30325201_1052.cpp:15:27: error: 'arrlen' was not declared in this scope
         sum=0,len=arrlen(a);
                           ^
0_0_30325201_1052.cpp:16:28: error: 'arrarr' was not declared in this scope
         while (p=arrarr(p,a)){
                            ^