View Compilation Error

0_0_11251422_20164.cpp:7: error: size of array `str' is too large
0_0_11251422_20164.cpp: In function `int main()':
0_0_11251422_20164.cpp:15: error: `str' undeclared (first use this function)
0_0_11251422_20164.cpp:15: error: (Each undeclared identifier is reported only once for each function it appears in.)