why is the output always 1:00?

Question

#include <iostream>

using namespace std;

void input (int hour, int min, char mode);
void convert (int hour, int min, char mode);
void output (int hour, int min, char mode);

int main(){
int hour, min;
char mode;
input (hour, min, mode);
convert (hour, min, mode);
output (hour, min, mode);

return 0;

}

void input (int hour, int min, char mode){
do{
cout << "Enter hour/s: " << endl;
cin >> hour;

cout << "Enter minute/s: " << endl;
cin >> min;

cout << "Enter A or P: " << endl;
cin >> mode;

if ((hour<1 && hour>12)||(min<0 && min>59)||(mode!='A' && mode!='P')){
cout << "Invalid inputs. Try again." << endl;
continue;
}
break;
} while (1);
}

void convert (int hour, int min, char mode){
switch (mode){
case 'P':
hour = hour + 12;
break;
case 'A':
if (hour==12){
hour = 00;
}
else{
hour = hour;
break;
}
}
}

void output (int hour, int min, char mode){
if (min<=9){
cout << "24-hr Time Mode: " << hour << ":0" << min;
}
else{
cout << "24-hr Time Mode: " << hour << ":" <<min;
}
}

Answer 1

You will want to pass your variables to input() function by reference, so that the modified values will be reflected in the variables local to main.

void input(int& hour, int& min, char& mode);

Edit both your function header and function prototype.