View Compilation Error

0_0_5239498_6479.cpp: In function `int main()':
0_0_5239498_6479.cpp:7: error: expected init-declarator before "double"
0_0_5239498_6479.cpp:7: error: expected `,' or `;' before "double"
0_0_5239498_6479.cpp:15: error: `n' undeclared (first use this function)
0_0_5239498_6479.cpp:15: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_5239498_6479.cpp:18: error: `s' undeclared (first use this function)
0_0_5239498_6479.cpp:18: error: `p' undeclared (first use this function)