View Compilation Error

0_0_6053051_19463.cpp: In function `void doit()':
0_0_6053051_19463.cpp:26: error: `srandom' undeclared (first use this function)
0_0_6053051_19463.cpp:26: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6053051_19463.cpp:50: error: `random' undeclared (first use this function)
0_0_6053051_19463.cpp:56: error: `typeof' undeclared (first use this function)
0_0_6053051_19463.cpp:56: error: expected `;' before "w"
0_0_6053051_19463.cpp:56: error: `w' undeclared (first use this function)