Here's what I have so far. I am trying to enter a number and convert the number entered into hours, minutes and seconds. I must use "pass by reference" in my code.
#include<stdio.h>
void time(int, int*, int*, int*); //Function Prototype
int main(void) //function header
{
int hold;
float total;
printf("Enter the number of seconds ->");
scanf("%d",&total);
scanf("%d", &hold);
return 0;
} // end of main function
void time (int total, int *hours, int *min, int *sec) // Function header Line
{
int rem1, rem2;
*hours = total / 3600;
rem1 = total % 3600;
*min = rem1 / 60;
rem2 = rem1 % 60;
printf ("the number of hours is ->", *hours);
printf ("the number of minutes is ->", *min);
printf ("the number of seconds is ->", *sec);
}
Here are some observations on the code you have posted.
- I'm not sure why you have declared the variable
hold. I'm assuming that the variable
total is supposed to be the total number of seconds that will be the input to your
time function. That being the case, then it should be declared as
int.
- In
main you don't even call your
time function. You haven't declared variables for hours, minutes and seconds as well. These should be declared and their addresses should be passed to the
time function you have defined (there's your pass by reference).
- In your
time function, you haven't calculated the number of seconds and you don't need the
rem2 variable as well.
- Depending on the requirements of your
time function, you probably don't want to print the results in the function itself - if this was the case, there would be no need to pass parameters for hours, minutes and seconds. In any case, you are missing a format specifier (%d) in your
printf function calls.
- You should look at providing a more meaningful name for the time function.
Here's a modified version of your code. Post back if you have more questions:
#include<stdio.h>
void time(int, int*, int*, int*);
int main(void) {
int total, hours, mins, secs;
printf("Enter the number of seconds -> ");
scanf("%d", &total);
time(total, &hours, &mins, &secs);
printf("the number of hours is -> %d\n", hours);
printf("the number of minutes is -> %d\n", mins);
printf("the number of seconds is -> %d\n", secs);
return 0;
}
void time(int total, int *hours, int *min, int *sec) {
int rem1;
*hours = total / 3600;
rem1 = total % 3600;
*min = rem1 / 60;
*sec = rem1 % 60;
}
Marked 
