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#include <stdio.h>
int main() 
{
/* variable definition; */
int intValue, menuSelect,Results;
intValue = 1;
// While a positive number
while (intValue > 0)
{
printf ("Enter a positive Interger\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 %d\n",intValue,Results);
printfThis is hard();
}
else if (menuSelect == 2)
{
// Call the Cube funtion
Results = Cube(intValue);
printf("cube of %d is %d\n",intValue, Results);
printfThis is hard();
}
else
printf("Invalid menu item, only 1 or 2 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)
{
return value*value*value;
}
void printfThis is hard(){
printf("This is hard! \n");
return;
}

prog.c: In function ‘main’:
prog.c:19:11: warning: implicit declaration of function ‘Square’ [-Wimplicit-function-declaration]
 Results = Square(intValue);
           ^~~~~~
prog.c:21:1: error: unknown type name ‘printfThis’
 printfThis is hard();
 ^~~~~~~~~~
prog.c:21:15: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘hard’
 printfThis is hard();
               ^~~~
prog.c:26:11: warning: implicit declaration of function ‘Cube’ [-Wimplicit-function-declaration]
 Results = Cube(intValue);
           ^~~~
prog.c:28:1: error: unknown type name ‘printfThis’
 printfThis is hard();
 ^~~~~~~~~~
prog.c:28:15: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘hard’
 printfThis is hard();
               ^~~~
prog.c: At top level:
prog.c:46:17: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘is’
 void printfThis is hard(){
                 ^~
prog.c:46:17: error: unknown type name ‘is’

Standard output is empty