Thread: Beginner help please

The aim of the code is to calculate the percentage of the student mark until the student enters N (when asked if there are anymore marks to calculate).



#include <stdio.h>
#include <string.h>
main()
{
int mark, pmark;
char reply;
reply = 'Y';
while (reply != 'N')
{
printf("What is your mark out of ten? \n");
scanf("%d", &mark);

pmark = mark * 10;

printf("Your percentage mark is %d\n", pmark);

printf("Any more marks to calculate? \n");
scanf("%c", &reply);
}
system ("pause");
return 1;
}


but instead it just loops and keeps asking for the student's mark.
Anyone able to help?
Thanks silas.

Originally Posted by itsme86

The problem is your usage of scanf(). When you're reading in the mark, it reads in the integer and then leaves the newline character on the input buffer. Then when you read in the reply it reads in the newline as your response instead of the character you typed.

You can correct the problem by just adding 'getchar();' before your scanf() call to read in the reply. Almost every beginner runs into scanf() issues and I don't know why they continue to teach it at the beginner level.

Thank you very much.