help with array calculations and function return values. I are noob!
I am trying to work on an assignment for college which is due Friday, but I am having some problems. The program is supposed to calculate the flight times in between two cites of the users choosing. Both times are stored in 2D arrays. The calculation will include layover times as well. I have it set up to display the hours only, since it is giving me a garbage value. I am having trouble using the return values in my functions as well. Source code attached.
Code:
#include <stdio.h>
#include <stdlib.h>
//function prototypes//
int getNum(void);
int checkRange1(int city1);
int checkRange2(int city2);
int calculateTime(int flyingTime[][6], int layoverTime[][6], int city1, int city2);
int displayResult(int totalTime);
int main(void)
{
//declare and initialize variables//
char numberIn; //number from keyboard//
int numberOut; //stores the string in getNum//
int c = '0'; //menu choice//
int city1 = 0;
int city2 = 0; //city choices//
int totalTime = 0; //total time calculated//
//arrays for the flying and layover times here//
int flyingTime[2][6] =
{
{0, 4, 3, 3, 2, 3}, //hours//
{0, 15, 58, 55, 14, 27} //minutes//
};
int layoverTime[2][6] =
{
{0, 1, 0, 11, 0, 0}, //hours//
{0, 20, 46, 29, 53, 0} //minutes//
};
while (c != 4)
{
printf("\t\tAirline Flights\n\n\n");
printf("1. Starting City:\n");
printf("2. Ending City:\n");
printf("3. Calculate Time Between The Cities Chosen:\n");
printf("4. Exit Program.\n\n");
printf("Option?\n");
printf("\n"); c = getNum();
//check numbers 1 to 4 using if ststements//
if (c == 1)
{
system("cls");
printf("Starting City:\n\n");
printf("1 - Toronto\n");
printf("2 - Atlanta\n");
printf("3 - Austin\n");
printf("4 - Denver\n");
printf("5 - Chicago\n");
printf("6 - Buffalo\n\n");
city1 = getNum();
checkRange1(city1);
}
if (c == 2)
{
system("cls");
printf("Ending City:\n\n");
printf("1 - Toronto\n");
printf("2 - Atlanta\n");
printf("3 - Austin\n");
printf("4 - Denver\n");
printf("5 - Chicago\n");
printf("6 - Buffalo\n");
city2 = getNum();
checkRange2(city2);
printf("Values chosen: %d, %d", city1, city2);
printf("\n\n");
}
if (c == 3)
{
system("cls");
calculateTime(flyingTime, layoverTime, city1, city2);
printf("Total Time Between Cities Chosen: %02d"); displayResult(totalTime);
}
if (c == 4)
{
system("cls");
printf("Have A Nice Flight!\n\n");
break;
}
}
return 0;
} //end of main//
//getNum() function//
// Function Description:
// This function takes in a array of char with 80 characters,
// and uses fgets(), sscanf() with stdin to get the string from the keyboard
// Parameters Passed:
// numberOut as an integer, and numberOut as an array of char
// Return Values:
// returns numberOut
int getNum(void)
{
int numberOut = 0;
char numberIn[80] = {0};
fgets(numberIn, 80, stdin);
sscanf(numberIn, "%d", &numberOut);
return numberOut;
}
//checkRange() function//
// Function Description:
// These functions check that the user is within the 6 number range
// for the city choices (1 - 6)
// Parameters Passed:
// city numbers (city1 and city2), minimum and maximum values are passed as integers
// Return Values:
// returns 0 if false, returns 1 if true
int checkRange1(int city1)
{
if (city1 >= 1 && city1 <= 6)
{
system("cls");
printf("\n");
return 1;
}
else
{
system("cls");
printf("Invalid Value. Try Again.\n\n");
return 0;
}
}
int checkRange2(int city2)
{
if (city2 >= 1 && city2 <= 6)
{
system("cls");
printf("\n");
return 1;
}
else
{
system("cls");
printf("Invalid Value. Try Again.\n\n");
return 0;
}
}
//calculateTime() function//
// Function Description:
// This function takes the two arrays from main() as parameters,
// and does the addition of the times using a for loop
// Parameters Passed:
// The layover array and the flight time array are passed
// Return Values:
// totalTime as an integer variable
int calculateTime(int flyingTime[][6], int layoverTime[][6], int city1, int city2)
{
int hours = 0; //hours//
int minutes = 0; //minutes//
int totalTime = 0;
int value = 0;
for(value = city1; value < city2; ++value)
{
hours += flyingTime[0][value];
minutes += flyingTime[1][value];
if (value != city2 - 1)
{
hours += layoverTime[0][value];
minutes += layoverTime[1][value];
}
}
return hours * 60 + minutes;
}
int displayResult(int totalTime)
{
int displayHours = totalTime / 60;
int displayMinutes = totalTime % 60;
printf("%02d", displayHours);
return 0;
}
Any help would be great!
