For example, three data x, f, d,

If the return value is not equal to 3, Scanf requires re-entry.

# include & ltstdio.h & gt

# include & ltstdlib.h & gt

Master ()

{

int x；

Floating f;

Double d;

while ( scanf("%d %f %lf "，& ampx & amp； f & amp； d)！ = 3) {

Printf ("Error, please enter int float double each again! \ n ")；

fflush(stdin)；

}

printf("good: %d %f %lf\n "，x，f，d)；

Returns 0;

}