C函数指针不工作-提前结束程序

我有一段代码，其中包含main之外的两个函数。我需要将多个值从一个函数传递到下一个函数。我试过使用指针，编译时没有错误，但程序只是提前结束了。我想这是参考电话，但我真的不明白。

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int GetRValues (char prompt[70]);
//start main
int main()
{
char prompt[70]="Please enter a value in the range 1000 to 1000000";
float R_a,R_b,R_c;
GetRValues(prompt[70]);
printf("%f, %f, %f", &R_a, &R_b, &R_c);
}
//function for receiving inputs
int GetRValues(char prompt[70])
{
//declare input variables
float *R_a;
//display prompt
printf("%sn", prompt);
//force user to input values for R_a
printf("R_a = ");
scanf("%f",&*R_a);
return 0;
}

以下是使用指针的完整程序：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int GetRValues (char prompt[70], float Rmin, float Rmax);      //declare input function
void ConvertValues(char input,float Ptr_a, float Ptr_b, float Ptr_c);    //declare conversion function
char input;
float Ptr_a, Ptr_b, Ptr_c;
int main()
{
float Rmin = 1000;
float Rmax = 1000000;
char prompt[70]="Please enter a value in the range 1000 to 1000000";

do
{
printf("Select operation:n");
printf("__________________________n");
printf("s: Star to Delta Transformationn");
printf("d: Delta to Star Transformationn");
printf("q: Exitn");
printf("__________________________n");
printf("Select: ");
scanf("%c",&input);

if (input == 's' || input == 'd')
{
GetRValues(prompt,Rmin,Rmax) ==0;
do
{
ConvertValues(input, Ptr_a, Ptr_b, Ptr_c);
break;
}
while (GetRValues(prompt,Rmin,Rmax) ==1);
}
}
while(input != 'q');
return 0;
}
int GetRValues(char prompt[70], float Rmin, float Rmax)
{
//declare input variables
float R_a,R_b,R_c,*Ptr_a,*Ptr_b,*Ptr_c;
void ConvertValues(char input,float Ptr_a, float Ptr_b, float Ptr_c);
//display prompt
printf("%sn", prompt);
//force user to input valid values for R_a, R_b and R_c
printf("R_a = ");
scanf("%f",&R_a);
while(R_a>Rmax)
{
printf("Please enter a value below %fn",&Rmax);
scanf("%f",&R_a);
}
while(R_a<Rmin)
{
printf("Please enter a value above %fn",&Rmin);
scanf("%f",&R_a);
}

printf("R_b = ");
scanf("%f",&R_b);
while(R_b>Rmax)
{
printf("Please enter a value below %fn",&Rmax);
scanf("%f",&R_b);
}
while(R_b<Rmin)
{
printf("Please enter a value above %fn",&Rmin);
scanf("%f",&R_b);
}
printf("R_c = ");
scanf("%f",&R_c);
while(R_c>Rmax)
{
printf("Please enter a value below %fn",&Rmax);
scanf("%f",&R_c);
}
while(R_c<Rmin)
{
printf("Please enter a value above %fn",&Rmin);
scanf("%f",&R_c);
}
//transferring values to pointers
*Ptr_a = R_a;
*Ptr_b = R_b;
*Ptr_c = R_c;
printf("%f",&Ptr_a);
return 1;
}
void ConvertValues(char input, float Ptr_a, float Ptr_b, float Ptr_c)
{
float R_a,R_b,R_c,R_1,R_2,R_3;
if (input ==  's')
{
R_1=(Ptr_a*Ptr_b)+(Ptr_b*Ptr_c)+(Ptr_a*Ptr_c)/Ptr_c;
R_2=(Ptr_a*Ptr_b)+(Ptr_b*Ptr_c)+(Ptr_a*Ptr_c)/Ptr_b;
R_3=(Ptr_a*Ptr_b)+(Ptr_b*Ptr_c)+(Ptr_a*Ptr_c)/Ptr_a;
printf("The resistance values in Delta: n");
printf("Ptr_a = %.2f Ohmsn",R_1);
printf("Ptr_b = %.2f Ohmsn",R_2);
printf("Ptr_c = %.2f Ohmsn",R_3);
}
else
{
R_1=(Ptr_a*Ptr_b)/Ptr_a+Ptr_b+Ptr_c;
R_2=(Ptr_a*Ptr_c)/Ptr_a+Ptr_b+Ptr_c;
R_3=(Ptr_b*Ptr_c)/Ptr_a+Ptr_b+Ptr_c;
printf("The resistance values in Star: n");
printf("Ptr_a = %.2f Ohmsn",R_1);
printf("Ptr_b = %.2f Ohmsn",R_2);
printf("Ptr_c = %.2f Ohmsn",R_3);

}
}