Stack Overflow Asked on December 30, 2021
When I use getchar in this code, the output doesn’t run correctly and consecutively!
#include <stdio.h>
#include <conio.h>
int main()
{
int i, sum=0, num;
float ave;
const int n = 5;
clrscr();
for(i = 0 ; i < n; i++) {
printf ("Enter number %d: ", i+1);
num = getchar();
sum += num;
}
ave = (float) sum / n;
printf("nThe average is: %6.2f", ave);
getch();
return 0;
}
Output: Enter number 1: 1 Enter number 2: Enter number 3: 2 Enter number 4: Enter number 5: 3 The average is: 34.00
getchar is a buffered function that holds the newline in the buffer. Correct code would be:
#include <stdio.h>
int main()
{
int i, sum=0, num;
float ave;
const int n = 5;
for(i = 0 ; i < n; i++) {
printf ("Enter number %d: ", i+1);
num = getchar();
getchar(); // Eat the buffered input
sum += num;
}
ave = (float) sum / n;
printf("nThe average is: %6.2f", ave);
getchar();
return 0;
}
(I don't have Windows and conio.h), but it should be the same. The extra call to getchar is for 'eating' the buffered newline.
Answered by Ilian Zapryanov on December 30, 2021
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