View Compilation Error

0_0_28121045_8978.cpp: In function 'int main()':
0_0_28121045_8978.cpp:12:101: error: expected ')' before '{' token
 if((str[j]>='a'&&str[j]<='z')||(str[j]>='A'&&str[j]<='Z')||(str[j]=='_'||(str[j]>='0'&&str[j]<='9')){flag=1;}
                                                                                                     ^
0_0_28121045_8978.cpp:14:1: error: expected primary-expression before '}' token
 }
 ^
0_0_28121045_8978.cpp:15:1: error: expected '}' before 'else'
 else{flag=0;}
 ^