include“ stdio. h3 nclude“ stdio. h” inO ino i float x; float x; printf(input average score ); printf(input average score"); scanf“%r”,&x); scanf(“%f”,&x); if(x>100|1x<0) if(x>100‖1x×0) printf(input error”); printf(“ input error”); else if(x<=100&&x>=90) else if(x<=100&&x>=90) printf(excellent”); printf(“ excellent”); else if(x<90 && x>=80 else if(x>=80) printf(good”); printf("good”); else if (x<80 & x>=60 else if(x>=60) printi( middle”); printf(middle”); else printf("bad”); Ise printf(bad”);#include “stdio.h” main() { float x; printf(“input average score”); scanf(“%f”,&x); if (x>100 || x<0) printf(“input error”); else if (x<=100 && x>=90) printf(“excellent”); else if (x<90 && x>=80) printf(“good”); else if (x<80 && x>=60) printf(“middle”); else printf(“bad”); } #include “stdio.h” main() { float x; printf(“input average score”); scanf(“%f”,&x); if (x>100 || x<0) printf(“input error”); else if (x<=100 && x>=90) printf(“excellent”); else if ( x>=80) printf(“good”); else if ( x>=60) printf(“middle”); else printf(“bad”); }