C program - Write a menu driven program to perform the following operations till the user selects Exit. Accept appropriate data for each option. Use standard library functions from math.h

Program

#include<stdio.h>
#include<math.h>
main()
{
int n;
double pr,n1,p,a,f,sqr,n3,n4;
do
{
printf("\nEnter your choice");
printf("\n1.Power or e^x \n2.Square Root \n3.Floor\n4.Ceiling\n5.sine\n6.cosine\n7.log\n8.Exit\n");
scanf("%d",&n);
switch(n)
{
case 1: printf("Enter a no and power: ");
scanf("%f%f",&n1,&p);
printf("%f",pow(n1,p));
break;
case 2: printf("Enter a no: ");
scanf("%f",&a);
sqr=sqrt(a);
printf("%f",sqr);
break;
case 3: printf("Enter a no: ");
scanf("%lf",&n3);
printf("%f",floor(n3));
break;
case 4: printf("Enter a no: ");
scanf("%f",&n4);
printf("%f",ceil(n4));
break;
case 5: printf("Enter a no: ");
scanf("%f",&n4);
printf("%f",sin(n4));
break;
case 6: printf("Enter a no: ");
scanf("%f",&n4);
printf("%f",cos(n4));
break;
case 7: printf("Enter a no");
scanf("%f",&n4);
printf("%f",log(n4));
break;
}
}while(n!=7);
}

Output:

Enter your choice
1.Power or e^x
2.Square Root
3.Floor
4.Ceiling
5.sine
6.cosine
7.log
8.Exit
4
Enter a no: 6
1.000000