prog.c: In function 'main':
prog.c:7:13: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
scanf("%d",a,b,c,d,e,f,g,h,i,j,k,l,m);
^
prog.c:7:11: warning: too many arguments for format [-Wformat-extra-args]
scanf("%d",a,b,c,d,e,f,g,h,i,j,k,l,m);
^~~~