View Compilation Error

0_0_3096963_29936.cpp: In function `void del_seg(long int, long int, long int, long int)':
0_0_3096963_29936.cpp:67: error: `mid' undeclared (first use this function)
0_0_3096963_29936.cpp:67: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_3096963_29936.cpp: In function `void d_seg(long int)':
0_0_3096963_29936.cpp:86: error: expected primary-expression before "int"
0_0_3096963_29936.cpp:86: error: expected `;' before "int"
0_0_3096963_29936.cpp:99: error: expected `}' at end of input
0_0_3096963_29936.cpp:99: error: expected `}' at end of input