View Compilation Error

264515_0_11472.cpp: In function `void build(int*, int*, int, int)':
264515_0_11472.cpp:20: error: invalid conversion from `int' to `int*'
264515_0_11472.cpp: At global scope:
264515_0_11472.cpp:28: error: `main' must return `int'
264515_0_11472.cpp: In function `int main(...)':
264515_0_11472.cpp:35: error: incompatible types in assignment of `int' to `int[20]'