C語言編程，壹小時以內！！

void main()

{

float score;

printf("請輸入成績:\n");

scanf("%f", &score);

if (score>=90.0)

printf("A\n");

if (score>=80.0 && score<90.0)

printf("B\n");

if (score>=70.0 && score<79.0)

printf("C\n");

if (score>=60.0 && score<69.0)

printf("D\n");

if (score<60.0)

printf("E\n");

}