View Compilation Error

0_0_36602624_1550.cpp: In function 'int main()':
0_0_36602624_1550.cpp:41:5: error: expected ',' or ';' before 'if'
     if(f<0)
     ^
0_0_36602624_1550.cpp:46:5: error: 'else' without a previous 'if'
     else
     ^