taking information from a structure and using in another function [closed] - c

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I need to know if I can call the information that is in tire_pressure in the structure and use it in another function? Basically I am not sure how to call it from one to the other. Do I have to declare the function in tireTest? Which is the function I am trying to access the tire_pressure information at. Thanks for the help
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
struct tires
{
char Manufacturer[40];
int tire_pressure[0];
int pressure_change[0];
}typedef tires;
// Prototypes
void getTireInformation(tires*, int);
void tirePressure(tires*, int);
void tireTest(tires*, int);
int main()
{
tires tire[4];
tires* ptire = &tire[0];
srand(time(NULL));
getTireInformation(ptire, 4);
tirePressure(ptire, 4);
tireTest(ptire, 4);
return 0;
}// end main
//============================
void getTireInformation(tires* ptire, int size)
{
int i = 0;
for (i = 0; i < size; i++)
{
printf("please enter Make for the tire: \n");
scanf("%s", &(ptire + i) ->Manufacturer);
}
printf("all tire make you entered ...just for verification:\n");
for(i = 0; i < size; i++)
printf("%s\n",(ptire +i) ->Manufacturer);
}//end getTireInformation
//=======================================================================
void tirePressure(tires* ptire, int size)
{
int i = 0;
int min = 18;
int max = 35;
for (i = 0; i < size; i++)
{
(ptire + i) ->tire_pressure[0] = rand() % (max - min + 1) + min;
printf("The Tire pressure is: ");
printf("%d\n",(ptire + i) -> tire_pressure[0]);
}// end for
}// end tirePressure
//==============================================================
void tireTest(tires* ptire, int size)
{
int i = 0;
int min = 2;
int max = 5;
int change[0] = {0};
i++;
for (i = 0; i < size; i++)
{
change[0] = rand() % (max - min + 1) + min;
//(ptire + i) -> pressure_change[0] = rand() % (max - min + 1) + min;
printf("Pressure change from test %d: %d\n",i + 1, change[0]);
//(ptire + i) -> pressure_change[0] = change[0] + tirePressure;
//printf("%d\n", (ptire +i) -> pressure_change);
}// end for
}

Answer 1

I think you're making the problem more difficult than it is -- see if this simplification solves your problems:
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define PRESSURE_MIN 18
#define PRESSURE_MAX 35
struct tires
{
char Manufacturer[40];
int tire_pressure;
int pressure_change;
} typedef tires;
// Prototypes
void getTireInformation(tires *, int);
void tirePressure(tires *, int);
void tireTest(tires *, int);
//===============================================================
void getTireInformation(tires *ptire, int size)
{
for (int i = 0; i < size; i++)
{
printf("please enter Make for the tire: \n");
scanf("%s", ptire[i].Manufacturer);
}
printf("all the tire makes you entered ... just for verification:\n");
for (int i = 0; i < size; i++)
{
printf("%s\n", ptire[i].Manufacturer);
}
} // end getTireInformation
//===============================================================
void tirePressure(tires *ptire, int size)
{
for (int i = 0; i < size; i++)
{
ptire[i].tire_pressure = rand() % (PRESSURE_MAX - PRESSURE_MIN + 1) + PRESSURE_MIN;
printf("The Tire pressure is: ");
printf("%d\n", ptire[i].tire_pressure);
} // end for
} // end tirePressure
//==============================================================
void tireTest(tires *ptire, int size)
{
int min = 2;
int max = 5;
for (int i = 0; i < size; i++)
{
int change = rand() % (max - min + 1) + min;
printf("Pressure change from test %d: %d\n", i + 1, change);
ptire[i].pressure_change = change + ptire[i].tire_pressure;
printf("%d\n", ptire[i].pressure_change);
} // end for
}
//===============================================================
int main()
{
tires tire[4];
srand(time(NULL));
getTireInformation(tire, 4);
tirePressure(tire, 4);
tireTest(tire, 4);
return 0;
} // end main