无法选择if循环的值

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#include <iostream>
#include <math.h>
using namespace std;
const float pi = 3.14;
void Odabir(int);
int main(){
    int choose;
    cout << "Odaberite 1 2 ili 3" << endl;
    cin >> choose;
    Odabir(choose);
    return 0;
}
void Odabir(int choose){
    if (choose = 1){
        float b, vb;
        cout << "Unesite duljinu stranice b: " << endl;
        cin >> b;
        cout << "Unesite duljinu visine na stranicu b vb: " << endl;
        cin >> vb;
        cout << "Povrsina raznostranicnog trokuta je: " << ((b*vb) / 2) << endl;
    }
    if (choose = 2){
        float r;
        cout << "Unesite duljinu polumjera: " << endl;
        cin >> r;
        cout << "Povrsina kruga je: " << pow(r, 2)*pi << endl;
    }

}

Been trying to solve that for few hrs and I cant get thru it , it looks like when I set choose value all three if's got executed and printed.

Answer 1

You are using the assignment operator ( = ) instead of the comparison operator ( == ) in the if statements in the function.

For example

if (choose = 1){
          ^^^ 

Write instead

if (choose == 1){
          ^^^^ 

Answer 2

You are assigning the variable choose instead of comparing it inside the Odabir function.

for instance, choose = 1 should be choose == 1