View Compilation Error

0_0_24785632_19620.cpp: In function 'int main()':
0_0_24785632_19620.cpp:9:13: error: 'f1' was not declared in this scope
         s=0,f1=0,f2=0;
             ^
0_0_24785632_19620.cpp:9:18: error: 'f2' was not declared in this scope
         s=0,f1=0,f2=0;
                  ^