4.8 Given a score on the one hundredth scale, requiring the output scores A, B, C, D, E. A score above 90 is A, 80~89 is B, 70~79 is C, 60~69 is D, 60 is E

//The fourth edition of C Programming (Tan Haoqiang)
 //Chapter: Chapter 4 Selecting Structure Programming Design
 //Question number: 4.8
 //Title: Given a score on a one hundred-point scale, requiring the output scores A, B, C, D, E.  A score above 90 is A, 80~89 is B, 70~79 is C, 60~69 is D, 60 is E
 #include <>
 int main()
 {
	 float grade;
	 printf("input grade: ");
	 scanf("%f",&grade);
	 if(grade>=90)
		 printf("A\n");
	 else if(grade>=80&&grade<=89)
		 printf("B\n");
	 else if(grade>=70&&grade<=79)
		 printf("C\n");
	 else if(grade>=60&&grade<=69)
		 printf("D\n");
	 else if(grade<60)
		 printf("E\n");
	 else
		 printf("input grade error!\n");
	 return 0;
 }