C code. Invalid operands to binary * and /?

5* for first person who helps me fix. Sorry about messy code and comments my compiler doesn't handle copy well.








#include %26lt;stdio.h%26gt;


#include %26lt;stdlib.h%26gt;





/*Asks the user their age, reads input, and returns value*/


void readAge(int *age);





/* Tells the age back*/


void writeAge(int age);





void doubleAge(int *age);





void halveAge (int *age);


/*Sets up the main goal of the function by asking for age and returning


the value along with other statements*/


int main(void) {





/* Interger variable for age. */


int age;





readAge(%26amp;age);





writeAge(age);





doubleAge(%26amp;age);





halveAge(%26amp;age);





/* Tells computer everything is a-ok*/


return EXIT_SUCCESS;





}





void readAge(int *age )


{


printf("How old are you?");


scanf("%d", age);


}





void doubleAge(int *age)


{


printf("Double that time and... \n", age);


writeAge( *age = age * 2);


printf("Wow that's old! \n", age);


}





void halveAge(int *age)


{


printf("Now if I cut your age in half... \n", age);


writeAge(age / 2);


printf("Haha you're almost a kid again! \n", age);


}





/* Repeating statement after every line*/


void writeAge(int age)


{


printf("You are %d!\n\n", age);


}|||writeAge( *age = age * 2);



You are passing the result of an assignment statement to writeAge?



do you mean:



*age *= 2;

writeAge(*age);