View Compilation Error

92780_0_16828.cpp:2: error: expected init-declarator before numeric constant
92780_0_16828.cpp:2: error: expected `,' or `;' before numeric constant
92780_0_16828.cpp: In function `float V()':
92780_0_16828.cpp:16: error: `PI' undeclared (first use this function)
92780_0_16828.cpp:16: error: (Each undeclared identifier is reported only once for each function it appears in.)