Simple calculator (using switch-case)

Program:

 #include<stdio.h>
int main()
{
char op;
float n1,n2,res;
printf("Enter two numbers: \n");
scanf("%f %f",&n1,&n2);
printf("Enter Operation (+,-,*,/): ");
fflush(stdin);
scanf("%c",&op);
switch(op)
{
case '+': res=n1+n2;
  break;
case '-': res=n1-n2;
  break;
case '*': res=n1*n2;
  break;
case '/': res=n1/n2;
  break;
default : printf("Invalid");
}
printf("Result: %.2f",res);
return 0;

}

Output:


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