My Masterpiece

As an IT student, I can’t imagine that I can create a very simple program, but difficult to do through your own will. I’m trying to be the very best as I can. Programming is not an easy field in my part. I do more practice to hone up this field. Here below, you can see a program that was familiar to your naked eyes.
#include
#include
int main()
{
float a,b,c,d,scores;
float grade;
printf("_______\n");
printf(" \t\t\t\tGrade Computation Program\n");
printf("_______\n");
printf("\n");
printf("\tInput Score for Term Exam: ");
scanf("%f",&a);
printf("\n");
printf("\tInput Score for Quiz: ");
scanf("%f",&b);
printf("\n");
printf("\tInput Score for Assignment: ");
scanf("%f",&c);
printf("\n");
printf("\tInput Score for Attendance: ");
scanf("%f",&d);
printf("\n");
grade=(a*.40)+(b*.30)+(c*.20)+(d*.10);
printf("\n");
printf("_______\n");
printf("\t\tYour grade: %f%%",grade);
printf("\n");
printf("\n");
if(grade>=90)
{
printf("\t\tEXCELLENT\n");
}
else if(grade>=80)
{
printf("\t\tVERY GOOD\n");
}
else if(grade>=70)
{
printf("\t\tGOOD\n");
}
else if(grade>=60)
{
printf("\t\tJUST PASSING\n");
}
else if(grade<60)
{
printf("\t\tFAILED\n");
}
printf("\n");
system("pause");
return 0;
}
Example:
Input Score for Term Exam: 45
Input Score for Quiz: 65
Input Score for Assignment: 34
Input Score for Attendance: 54
Output:
Your Grade: 49.700001%

FAILED

Note: You, as a USER try to open this program to DEV C++, enable for you to satisfied the result if it is correct.