fibo1.cpp: In function `int main()': fibo1.cpp:7: warning: `int a' might be used uninitialized in this function fibo1.cpp:7: warning: `int x' might be used uninitialized in this function fibo1.cpp:7: warning: `int y' might be used uninitialized in this function fibo1.cpp:36:1: warning: no newline at end of file