prog.c: In function 'main':
prog.c:7:9: error: redeclaration of 'd' with no linkage
int d=5
^
prog.c:4:15: note: previous declaration of 'd' was here
int a,b,c,d,e,f,g,h,i,j;
^
prog.c:8:5: error: expected ',' or ';' before 'scanf'
scanf("%d%d%d%d%d%d%d%d%d%d",&a,&b,&c,&d,&e,&f,&g,&h,&i,&j);
^~~~~