Running the code below will automatically round up the last real value.
Enter: 4
15 23.6 100.35 0.388
#include <stdio.h>
int main(void)
{
int cnt;
scanf("%d", &cnt);
double arr[cnt];
double hap=0;
for(int i=0; i<cnt; i++)
{
scanf("%lf", &arr[i]);
printf("%.2lf ", arr[i]);
hap += arr[i];
}
printf("\n");
printf("hap : %.2lf\n", hap);
printf("avg : %.2lf", hap/cnt);
return 0;
}
Is it because of %.2lf?
In accordance with IEEE's recommendation, the OS automatically rounds up and outputs during the output process.
#include <stdio.h>
#include <math.h>
int main()
{
double x = 1.159;
printf("%.2lf", floor(x * 100) / 100);
return 0;
}
You can use the above trick.
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