How to pass different data type as parameter in C?

 Return different data type in the same function in c:

• If passing different datatype then must be declared in global.
• Similarly If needs to return different data type in the same function then must be given function return type as char.
• When you give the char data type should use the pointer concept.

Example program for print the set of elements:

1. #include<stdio.h>

   #include<conio.h>

   float calc(int, float); //calc function declaration

   float discount(float); // discount function declaration

   char *display(int,float,char []);//display function declaration

   int main()

   {

             int qty;

             float result,price;

             char name[15];

             clrscr();

             printf("Enter a product name :");

             scanf("%s",&name);

             printf("Enter a qty:");

   scanf("%d",&qty);

   printf("Enter a price:");

   scanf("%f",&price);

   display(qty,price,name); //display function calling

   result=calc(qty,price);//calc function calling

   printf("\nThe total amount is %f",result);

   discount(result); // discount function calling

   getch();

   return 0;

   }

   float calc(int x,float y) //calc function definition

   {

   float z;

   z=x*y;

   return z;

   }

   float discount(float a) // discount function definition

   {

   if(a>=500)

   {

   a=a*0.30;

   printf("\n 30 percent discount so paid amount is : %f",a);

   return a;

   }

   else if(a<=499&&a>=300)

   {

   a=a*0.20;

   printf("\n20 percent discount so paid amount is : %f",a);

   return a;

   }

   else if(a<=299&&a>=100)

   {

   a=a*0.10;

   printf("\n 10%discount so paid amount is : %f",a);

   return a;

   }

   else{

   a=a*0.05;

   printf("\n 5 percent discount so paid amount is : %f",a);

   return a;

   }

   }

   char *display(int q,float p,char *n) //display function definition

   {

   printf("\nDetails of product.....");

   printf("\nItem name : %s",n);

   printf("\nQuantity of item : %d",q);

   printf("\nUnit price is : %f",p);

   return "null";

   }

Output:

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