/in/ex1.c: In function 'main':
/in/ex1.c:18:15: warning: comparison with string literal results in unspecified behavior [-Waddress]
     if (a.PorM=="-"){
               ^~
/in/ex1.c:21:15: warning: comparison with string literal results in unspecified behavior [-Waddress]
     if (b.PorM=="-"){
               ^~
/in/ex1.c:24:10: warning: comparison with string literal results in unspecified behavior [-Waddress]
     if (c=="+"){
          ^~
/in/ex1.c:15:5: warning: 'a.i' is used uninitialized in this function [-Wuninitialized]
     scanf("%d%c%d%c ",&a.real,a.PorM,&a.imaging,a.i);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/ex1.c:15:5: warning: 'a.PorM' is used uninitialized in this function [-Wuninitialized]
/in/ex1.c:17:5: warning: 'c' is used uninitialized in this function [-Wuninitialized]
     scanf("%c",c);
     ^~~~~~~~~~~~~