prog.c:3:6: error: return type of 'main' is not 'int' [-Werror=main]
void main()
^
prog.c: In function 'main':
prog.c:5:37: error: initializer-string for array of chars is too long [-Werror]
char a[10][5] = {"hi", "hello", "fellow"};
^
prog.c:5:37: note: (near initialization for 'a[2]')
cc1: all warnings being treated as errors