true #include <stdio.h> int main() { double a,b,c; while(scanf("%lf%lf", &a, &b) != EOF) { if (b!=0) { c=a/b; printf("%.2f\n", c); } else printf("error\n"); } return 0; } 992628 AC 3020,3021,3022,3023, 48.0 AC:运行结果正确 76