View Compilation Error

0_0_23251637_13590.cpp: In function 'int main()':
0_0_23251637_13590.cpp:15:17: error: expected ')' before 'printf'
                 printf("4\n");
                 ^
0_0_23251637_13590.cpp:28:8: error: 'else' without a previous 'if'
        else if(n%10==3)
        ^
0_0_23251637_13590.cpp: At global scope:
0_0_23251637_13590.cpp:43:5: error: expected unqualified-id before 'return'
     return 0;
     ^
0_0_23251637_13590.cpp:44:1: error: expected declaration before '}' token
 }
 ^