Please answer, will rate!

A test consists of 8 multiple choice questions, each of which has three possible answers. The first answer is four points, the second one, and the third three points. Write a C program that uses switch statement to read eight answers from the test and display final score.

This is my code, help me solve my error. It does not compute anything.

#include int main(){ int total_grade=0; int grades[8]; int maxcount=8; int i; printf("Enter the 8 multiple choice selections: "); scanf("%d ",&grades[8]); for(i = 0; i < maxcount; i++){ switch(grades[i]){ //4 points case '1': total_grade+=4; break; //1 point case '2': total_grade+=1; break; //3 points case '3': total_grade+=3; break; } } printf("%d ",total_grade); return 0; }