unreachable code

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i have issue with this program when it runs it shows the error of unreachable code plz anyone tell me how to solve this error in c langugae

Code:

---

#include<stdio.h>
#include<conio.h>
void main(void)
{
clrscr();
float num1,num2,add,sub,mul,div;
char op,ans;
printf("Enter the number and operation which you want to perform:\n");
scanf("%f %c %f",&num1,&op,&num2);
        do
        {
          {
                if(op=='+')
                {
                add=num1+num2;
                printf("Resut of addition %f\n",add);
                break;
                }
                else if(op=='-')
                {
                sub=num1-num2;
                printf("Result of subtraction %f\n",sub);
                break;
                }
                else if(op=='*')
                {
                mul=num1*num2;
                printf("Result of multiplication %f\n",mul);
                break;
                }
                else
                {
                div=num1/num2;
                printf("Result of division %f\n",div);
                break;
                }
        printf("Do you want to continue:(y/n):");
        scanf("%c",&ans);
        }
        }
        while(ans!='n');
getch();
}

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Well you don't need break statements inside an if / elseif chain,