View Compilation Error

0_0_2618815_21782.cpp:3: error: `main' must return `int'
0_0_2618815_21782.cpp: In function `int main(...)':
0_0_2618815_21782.cpp:4: error: conflicting declaration 'int a'
0_0_2618815_21782.cpp:4: error: 'a' has a previous declaration as `int a[100]'
0_0_2618815_21782.cpp:4: error: declaration of `int a'
0_0_2618815_21782.cpp:4: error: conflicts with previous declaration `int a[100]'
0_0_2618815_21782.cpp:9: error: incompatible types in assignment of `int' to `int[100]'
0_0_2618815_21782.cpp:19: error: incompatible types in assignment of `int*' to `int[100]'