/in/foo.c: In function 'main':
/in/foo.c:9:10: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
  scanf("%d%d",n,m);
          ^
/in/foo.c:9:12: warning: format '%d' expects argument of type 'int *', but argument 3 has type 'int' [-Wformat=]
  scanf("%d%d",n,m);
            ^
/in/foo.c:10:10: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
  scanf("%d%d",x1,x2);
          ^
/in/foo.c:10:12: warning: format '%d' expects argument of type 'int *', but argument 3 has type 'int' [-Wformat=]
  scanf("%d%d",x1,x2);
            ^
/in/foo.c:11:10: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
  scanf("%d%d",y1,y2);
          ^
/in/foo.c:11:12: warning: format '%d' expects argument of type 'int *', but argument 3 has type 'int' [-Wformat=]
  scanf("%d%d",y1,y2);
            ^
/in/foo.c:9:2: warning: 'n' is used uninitialized in this function [-Wuninitialized]
  scanf("%d%d",n,m);
  ^~~~~~~~~~~~~~~~~
/in/foo.c:9:2: warning: 'm' is used uninitialized in this function [-Wuninitialized]
/in/foo.c:10:2: warning: 'x1' is used uninitialized in this function [-Wuninitialized]
  scanf("%d%d",x1,x2);
  ^~~~~~~~~~~~~~~~~~~
/in/foo.c:10:2: warning: 'x2' is used uninitialized in this function [-Wuninitialized]
/in/foo.c:11:2: warning: 'y1' is used uninitialized in this function [-Wuninitialized]
  scanf("%d%d",y1,y2);
  ^~~~~~~~~~~~~~~~~~~
/in/foo.c:11:2: warning: 'y2' is used uninitialized in this function [-Wuninitialized]
/in/foo.c:26:5: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized]
     printf("%d",c*100000000);
     ^~~~~~~~~~~~~~~~~~~~~~~~