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#include <stdio.h>
 
float Square(int);
float Cube(int);
float Shrink(int);
int main ()
{
 
/* variable definition: */ 
int intValue, menuSelect,
float Results;
intValue = 1;
 
// While a positive number
while (intValue > 0)
{ 
printf ("Enter a positive Integer\n: ");
scanf("%d", &intValue);
if (intValue > 0)
{
printf ("Enter 1 to calculate Square, 2 to Calculate Cube \n: ");
scanf("%d", &menuSelect);
if (menuSelect == 1)
{
// Call the Square Function
Results = Square(intValue);
printf("Square of %d is %f\n",intValue,Results);
}
else if (menuSelect == 2)
{
// Call the Cube function
Results = Cube(intValue);
printf("Cube of %d is %f\n",intValue,Results);
}
else if (menuSelect == 3)
{
//call the shrink function
Results = Shrink(intValue);
printf("Half of %d is %f\n", intValue, Results);
else 
printf("Invalid menu item, only 1, 2, or 3 is accepted\n");
}
}
return 0;
}
/* function returning the Square of a number */
int Square(int value)
{
return value*value;
} 
/* function returning the Cube of a number */
int Cube(int value)
{

prog.c: In function ‘main’:
prog.c:11:1: error: expected identifier or ‘(’ before ‘float’
 float Results;
 ^~~~~
prog.c:26:1: error: ‘Results’ undeclared (first use in this function)
 Results = Square(intValue);
 ^~~~~~~
prog.c:26:1: note: each undeclared identifier is reported only once for each function it appears in
prog.c:40:1: error: expected ‘}’ before ‘else’
 else
 ^~~~
prog.c: At top level:
prog.c:47:5: error: conflicting types for ‘Square’
 int Square(int value)
     ^~~~~~
prog.c:3:7: note: previous declaration of ‘Square’ was here
 float Square(int);
       ^~~~~~
prog.c:52:5: error: conflicting types for ‘Cube’
 int Cube(int value)
     ^~~~
prog.c:4:7: note: previous declaration of ‘Cube’ was here
 float Cube(int);
       ^~~~
prog.c: In function ‘Cube’:
prog.c:53:1: error: expected declaration or statement at end of input
 {
 ^
prog.c:53:1: warning: control reaches end of non-void function [-Wreturn-type]
 {
 ^

Standard output is empty