What is the problem of this code

Question

#include <stdio.h>
void main()
{
float a,b;
char op;
int answer;

printf("Enter the your first value\n");
scanf("%f",&a);

printf("Enter the your first value\n");
scanf("%f",&b);

printf("Enter the your Operation");
scanf("%c",&op);

switch (op)
{
case "+":
answer(a+b);
break;

case "-":
answer(a-b);
break;

case "*":
answer(a*b);
break;

case "/":
answer(a/b);
break;
}
}

Answer 1

You ask "Enter the your first value" two times.

Answer 2

Use single quotes for charecters.. Double quotes are used for strings...
Print result.. And take answer as float type as well otherwise you miss fraction part..

Edit : Rana Naskar
Oh. Why dublicate?
answer(a+b) this is calling function 'answer' by a+b value.. Where is answer function? In other question answer=a+b is fine.

https://www.sololearn.com/Discuss/2597975/?ref=app