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Convert Seconds to Hours Minutes (must use Pass by Reference)

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LostnC

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Convert Seconds to Hours Minutes (must use Pass by Reference)

Oct 22nd, 2009

I need to convert seconds to Minutes, hours and seconds.
I must use pass by reference in variables.
I know I need to use the modulus to deal with the remainders when I'm converting to Hours, minutes and seconds. I am really having a difficult time with the code.

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Ancient Dragon Ancient Dragon is offline

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Oct 23rd, 2009

We only help those who help themselves. Post the code you tried. You will have to know a little about pointers if you are required to pass variables by reference.

Last edited by Ancient Dragon; Oct 23rd, 2009 at 1:27 am.

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LostnC

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Oct 26th, 2009

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Originally Posted by Ancient Dragon

We only help those who help themselves. Post the code you tried. You will have to know a little about pointers if you are required to pass variables by reference.

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.

 Help with Code Tags 
 c Syntax (Toggle Plain Text) 
#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);  
        }
#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);  
        }

Last edited by WaltP; Oct 27th, 2009 at 3:22 am. Reason: Added CODE tags -- with all the help about them, how could you miss using them????

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yellowSnow yellowSnow is offline

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Oct 27th, 2009

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Originally Posted by LostnC

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.
Help with Code Tags

c Syntax (Toggle Plain Text)
#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);  
        }
#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:

 Help with Code Tags 
 C Syntax (Toggle Plain Text) 
#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;
}
#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;
}