View Compilation Error

0_0_6716671_32347.cpp: In function `int cmp(const void*, const void*)':
0_0_6716671_32347.cpp:11: error: invalid conversion from `const void*' to `sort*'
0_0_6716671_32347.cpp:12: error: invalid conversion from `const void*' to `sort*'
0_0_6716671_32347.cpp: At global scope:
0_0_6716671_32347.cpp:16: error: `main' must return `int'