View Compilation Error

54845_0_8698.cpp: In function `void deal()':
54845_0_8698.cpp:11: error: `sqrt' undeclared (first use this function)
54845_0_8698.cpp:11: error: (Each undeclared identifier is reported only once for each function it appears in.)
54845_0_8698.cpp:15: error: name lookup of `j' changed for new ISO `for' scoping
54845_0_8698.cpp:12: error:   using obsolete binding at `j'
54845_0_8698.cpp: In function `bool jp(int)':
54845_0_8698.cpp:24: error: `sqrt' undeclared (first use this function)