foo.cpp: In function 'int main()':
foo.cpp:22:46: error: invalid operands of types 'float [2]' and 'float' to binary 'operator-'
foo.cpp:22:71: error: invalid operands of types 'float [2]' and 'float' to binary 'operator-'
foo.cpp:22:98: error: invalid operands of types 'float [2]' and 'float' to binary 'operator-'
foo.cpp:22:123: error: invalid operands of types 'float [2]' and 'float' to binary 'operator-'
foo.cpp:29:15: error: 'system' was not declared in this scope