I have a question, can you limit the number of decimal places in C ++?
float x = 2.958;
Instead of rounding up or down using floorf , roundf , can you just pick up the two numbers after the comma?
That would look more or less like this
float x = 2.95;
One way would look like this:
#include <iostream>
using namespace std;
int main() {
float num = 3.14159;
cout << fixed;
cout.precision(2);
cout << num << endl;
printf("%.2f", num); //apenas se for usar em C puro, não use em C++
return 0;
}
See running on ideone .
You can achieve the expected value using the floorf() function, like this:
#include <iostream>
#include <cmath>
using namespace std;
int main(){
float x = 2.958;
cout << floorf(x * 100) / 100;
return 0;
}
See working at Ideone