View Compilation Error

0_0_5994021_21060.cpp: In function `int main()':
0_0_5994021_21060.cpp:15: error: `s' does not name a type
0_0_5994021_21060.cpp:21: error: `s' undeclared (first use this function)
0_0_5994021_21060.cpp:21: error: (Each undeclared identifier is reported only once for each function it appears in.)