●Finding Average Score of Exams in C

int main(){

int rate1,rate2,rate3,score1,score2,score3;char a;int rate4,score4;int total,t1,t2,t3,t4;

printf("Is there any quiz/homework?\nIf Yes enter 'y' else 'n' and push enter\n");

a=getchar();

printf("\nEnter the first midterm's percantage ");

scanf("%d",&rate1);

printf("Enter the second midterm's percantage ");

scanf("%d",&rate2);

printf("Enter the final's percantage ");

scanf("%d",&rate3);

if(a=='y'){

printf("Enter the quiz/homework's percantage ");

scanf("%d",&rate4);}

printf("\nEnter the first midterm's score ");

scanf("%d",&score1);

printf("Enter the second midterm's score ");

scanf("%d",&score2);

printf("Enter the final's score ");

scanf("%d",&score3);

if(a=='y'){

printf("Enter the quiz/homework's score ");

scanf("%d",&score4); }

t1=0.01*rate1*score1;

t2=0.01*rate2*score2;

t3=0.01*rate3*score3;

t4=0.01*rate4*score4;

total=t1+t2+t3+t4;

printf("\nYour average score is %d\n\n",total);

}