In C language, float type such as 37.7777779
37.777779 -> How do I round to the second decimal place, such as 37.78?
floating-point c decimal-number
Write the format specifier %.2f if you are just outputting, not operating.
int main(void) {
float myfloat = 37.777779;
printf("%.2f", myfloat);
}
Output: 37.78
Depending on the lowering/rounding/up, you must write floorf, roundf, roundf for <math.h> respectively.
#include <math.h>
float val = 37.777779;
float rounded_down = floorf(val * 100) / 100; /* down: 37.77 */
float nearest = roundf(val * 100) / 100; /* rounded: 37.78 */
float rounded_up = sealf(val * 100) / 100; /* from: 37.78 */
There is an error in the floating point operation There may be a slight difference from the existing value.
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