zoj 1241 Geometry Made Simple

//由于粗心，连输出的英文都写错，WA了很多次，找到我头晕了 #include "stdio.h" #include "cmath"int main(){float a,b,c;float ans; int count=0; while(scanf("%f%f%f",&a,&b,&c)&&a!=0&&b!=0&&c!=0){ count++;printf("Triangle #%d\n",count);if (a==-1) { if(b>=c||b<=0||c<=0) printf("Impossible.\n");else{ ans= (float)sqrt((c*c-b*b));printf("a = %0.3f\n",ans);} }if(b==-1){if (a>=c||a<=0||c<=0)printf("Impossible.\n");else{ans=(float)sqrt((c*c-a*a));printf("b = %0.3f\n",ans); }} if(c==-1){if(a<=0||b<=0)printf("Impossible.\n"); else{ ans=(float)sqrt((a*a+b*b)); printf("c = %0.3f\n",ans);} } printf("\n");} }