View Compilation Error

0_0_35973351_16590.cpp: In function 'int main()':
0_0_35973351_16590.cpp:46:9: error: 'else' without a previous 'if'
         else printf("NULL\n");
         ^
0_0_35973351_16590.cpp: At global scope:
0_0_35973351_16590.cpp:48:5: error: expected unqualified-id before 'return'
     return 0;
     ^
0_0_35973351_16590.cpp:49:1: error: expected declaration before '}' token
 }
 ^