#include <stdio.h>
int main()
{
int numberGrade;
char letterGrade;
scanf("%d",&numberGrade
); switch (numberGrade) {
case 4: letterGrade = 'A';
case 3: letterGrade = 'B';
case 2: letterGrade = 'C';
case 1: letterGrade = 'D';
case 0: letterGrade = 'F';
break;
default: ;
}
}
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