/in/ex1.c: In function 'main':
/in/ex1.c:8:20: warning: unused variable 'b' [-Wunused-variable]
     complex double b = f + g * _Complex_I;
                    ^
/in/ex1.c:7:20: warning: unused variable 'a' [-Wunused-variable]
     complex double a = d + e * _Complex_I;
                    ^
/in/ex1.c:7:26: warning: 'e' is used uninitialized in this function [-Wuninitialized]
     complex double a = d + e * _Complex_I;
                          ^
/in/ex1.c:7:26: warning: 'd' is used uninitialized in this function [-Wuninitialized]
/in/ex1.c:8:26: warning: 'g' is used uninitialized in this function [-Wuninitialized]
     complex double b = f + g * _Complex_I;
                          ^
/in/ex1.c:8:26: warning: 'f' is used uninitialized in this function [-Wuninitialized]
/in/ex1.c:9:26: warning: 'i' is used uninitialized in this function [-Wuninitialized]
     complex double c = h + i * _Complex_I;
                          ^
/in/ex1.c:9:26: warning: 'h' is used uninitialized in this function [-Wuninitialized]