int main()
{
float stud1[2], stud2[2], total1, total2, ave1, ave2;
int x;
char letter1, letter2,opt;
do
{
system ("cls");
printf ("Enter the test scores for Student 1\n");
printf ("Test 1: ");
scanf("%f", &stud1[0]);
//Error checking, when the user inputs a value less than 0 or more than 100
if (stud1[0] > 100 || stud1[0] < 0)
{
do
{
printf("The test is out of 100, please enter a number between 0 - 100: ");
scanf("%f", &stud1[0]);
}
while (stud1[0]> 100 || stud1[0] < 0);
}
printf ("Test 2: ");
scanf("%f", &stud1[1]);
//Error checking, when the user inputs a value less than 0 or more than 100
if (stud1[1]> 100 || stud1[1] < 0)
{
do
{
printf("The test is out of 100, please enter a number between 0 - 100: ");
scanf("%f", &stud1[1]);
}
while (stud1[1]> 100 || stud1[1] < 0);
}
printf ("Test 3: ");
scanf("%f", &stud1[2]);
//Error checking, when the user inputs a value less than 0 or more than 100
if (stud1[2]> 100 || stud1[2] < 0)
{
do
{
printf("The test is out of 100, please enter a number between 0 - 100: ");
scanf("%f", &stud1[2]);
}
while (stud1[2]> 100 || stud1[2] < 0);
}
total1 = stud1[0] + stud1[1] +stud1[2]; //Adds up all the makrs
ave1 = total1/3.0; //Calculate the average of the marks
//Assign a certain letter grade depending on the average marks
if (ave1 >= 90 && ave1 <= 100)
{
letter1 = 'A';
}
else if (ave1 >= 80 && ave1 < 90)
{
letter1 = 'B';
}
else if (ave1 >= 70 && ave1 < 80 )
{
letter1 = 'C';
}
else if (ave1 >= 60 && ave1 < 70)
{
letter1 = 'D';
}
else if (ave1 >= 50 && ave1 < 60 )
{
letter1 = 'E';
}
else if (ave1 < 50)
{
letter1 = 'F';
}
printf ("\n");
printf ("Now, enter the test scores for Student 2\n");
printf ("Test 1: ");
scanf("%f", &stud2[0]);
//Error checking, when the user inputs a value less than 0 or more than 100
if (stud2[0]> 100 || stud2[0] < 0)
{
do
{
printf("The test is out of 100, please enter a number between 0 - 100: ");
scanf("%f", &stud2[0]);
}
while (stud2[0]> 100 || stud2[0] < 0);
}
printf ("Test 2: ");
scanf("%f", &stud2[1]);
//Error checking, when the user inputs a value less than 0 or more than 100
if (stud2[1]> 100 || stud2[1] < 0)
{
do
{
printf("The test is out of 100, please enter a number between 0 - 100: ");
scanf("%f", &stud2[1]);
}
while (stud2[1]> 100 || stud2[1] < 0);
}
printf ("Test 3: ");
scanf("%f", &stud2[2]);
//Error checking, when the user inputs a value less than 0 or more than 100
if (stud2[2]> 100 || stud2[2] < 0)
{
do
{
printf("The test is out of 100, please enter a number between 0 - 100: ");
scanf("%f", &stud2[2]);
}
while (stud2[2]> 100 || stud2[2] < 0);
}
total2 = stud2[0] + stud2[1] + stud2[2]; //Adds up all of the marks
ave2 = total2/3; //Calculate the average of the marks
//Assign a certain letter grade depending on the average marks
if (ave2 >= 90 && ave2 <= 100)
{
letter2 = 'A';
}
else if (ave2 >= 80 && ave2 < 90)
{
letter2 = 'B';
}
else if (ave2 >= 70 && ave2 < 80 )
{
letter2 = 'C';
}
else if (ave2 >= 60 && ave2 < 70)
{
letter2 = 'D';
}
else if (ave2 >= 50 && ave2 < 60 )
{
letter2 = 'E';
}
else if (ave2 < 50)
{
letter2 = 'F';
}
else
printf ("You entered incorrect values for the marks");
system ("cls");
printf("\n");
printf("%25s", "Test 1 (%)");
printf("%16s", "Test 2 (%)");
printf("%16s", "Test 3 (%)");
printf("%16s", "Average (%)");
printf("%21s", "Letter Grade\n\n");
printf(" Student 1");
printf(" %.1f", stud1[0]);
printf(" %.1f", stud1[1]);
printf(" %.1f", stud1[2]);
printf(" %.1f", ave1);
printf(" %c", letter1);
printf("\n\n");
printf(" Student 2");
printf(" %.1f", stud2[0]);
printf(" %.1f", stud2[1]);
printf(" %.1f", stud2[2]);
printf(" %.1f", ave2);
printf(" %c", letter2);
printf("\n\n\n");
printf(" Do you want to enter another set of marks (y/n)? ");
opt = getchar();
opt = getchar();
}
while (opt == 'Y' || opt == 'y');
}
Okay, that's me entire code. And my question is, is there a way to error trap an user input to just get say a number, so it will basically keep looping if the user keep entering strings. And also, I would like to ask some feedback on my coding, what could I improve on? Thank you very much.
