C ++中的算术运算

Question

#include"iostream"
using namespace std;

int main(){

    float arithmetic_operation = (4+5)+9*2-4+2/5+1-13;
    cout<< arithmetic_operation << " <--The Result." << endl;

    return 0;
}

I am getting 11 <--The Result. But actually the result is 11.4, Can someone please help me to understand the point please.

Answer 1

You are doing integer arithmetic . All operands are integers, which meand all operations will be done using integer operations. And for integer division 2/5 is equal to zero.

Use floating point value all over instead:

double arithmetic_operation = (4.+5.)+9.*2.-4.+2./5.+1.-13.;