View Compilation Error

0_0_26160042_18920.cpp: In function 'int main()':
0_0_26160042_18920.cpp:11:4: error: expected initializer before 'if'
    if(p==q)ans=1.0*n/(m+n);
    ^
0_0_26160042_18920.cpp:12:4: error: 'else' without a previous 'if'
    else {
    ^
0_0_26160042_18920.cpp:14:5: error: 'ans' was not declared in this scope
     ans=(1.0-pow(k,n))/(1.0-pow(k,n+m));
     ^
0_0_26160042_18920.cpp:16:20: error: 'ans' was not declared in this scope
    printf("%.2f\n",ans);
                    ^