View Compilation Error

0_0_7723392_1405.cpp:1:9: #include expects "FILENAME" or <FILENAME>
0_0_7723392_1405.cpp:2:9: #include expects "FILENAME" or <FILENAME>
0_0_7723392_1405.cpp: In function `int cmp2(qnode, qnode)':
0_0_7723392_1405.cpp:35: error: expected `;' before '}' token
0_0_7723392_1405.cpp: In function `int cmp(tnode, tnode)':
0_0_7723392_1405.cpp:39: error: expected `;' before '}' token
0_0_7723392_1405.cpp: In function `int main()':
0_0_7723392_1405.cpp:47: error: `scanf' undeclared (first use this function)
0_0_7723392_1405.cpp:47: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7723392_1405.cpp:52: error: `memset' undeclared (first use this function)
0_0_7723392_1405.cpp:64: error: `sort' undeclared (first use this function)
0_0_7723392_1405.cpp:76: error: `printf' undeclared (first use this function)