Project 1: Basic Telecom Platform operations

#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
char choice;
int i,num,count;

printf("Enter the desired extension to get service from platform :\n");
printf("\n");

printf("'a' for Addition\n");
printf("'b' for Multiplication\n");
printf("'c' for Increment\n");
printf("'d' for Modulus\n");
printf("'e' for Right shift\n");
printf("'f' for Left shift\n");
printf("'g' for power\n");
printf("'h' for AND operation\n");
printf("'i' for OR operation\n");
printf("'j' to Count no of set bits\n");
printf("\n");
printf("press 'k' to show kpi status\n");
printf("\n");
printf("press 'q' to Shutdown the platform\n");
printf("\n");
printf(" GIVE YOUR INPUT \n");

while(1)
{
scanf(" %c",&choice);
switch(choice)
{
case 'a':
printf(" ADDITION\n");
printf("Enter the number of elements you want to add: ");
scanf("%d",&num);
printf("Enter the number one by one\n");
int val,sum = 0;
for (i=0; i<num; ++i)
{
scanf("%d",&val);
sum=sum+val;
}
printf("\nSum of %d numbers = %d \n\n",num,sum);
break;

case 'b':
printf(" MULTIPLICATION\n");
printf("Enter the number of elements you want to Multiplication: ");
scanf("%d",&num);
int val1,mul = 1;
for (i=0; i<num; ++i)
{
scanf("%d",&val1);
mul=mul*val1;
}
printf("\nMul of %d numbers = %d \n\n",num,mul);
break;
case 'c':
printf(" INCREMENT\n");
printf("Enter the number you want to Increment: ");
scanf("%d",&num);
int incr;
scanf("%d",&incr);
incr=num++;
printf("\nIncrement is %d for %d \n\n",num,incr);
break;
case 'd':
printf(" MODULUS\n");
printf("Enter the numbers to perform modulus between them: ");

int num1,num2;
float res;
scanf("%d",&num1);
scanf("%d",&num2);
res=num1%num2;
printf("\nM of %d numbers = %d \n\n",num,incr);
break;
case 'e':
printf(" RIGHT SHIFT\n");
printf("Enter the number to Right Shift: ");
int num3;
scanf("%d",&num);
printf("num>>1 of %d = %d\n",num,(num >> 1));
break;
case 'f':
printf(" LEFT SHIFT\n");
printf("Enter the number to left Shift: ");
int num4;
scanf("%d",&num4);
printf("num<<1 of %d = %d\n",num4,(num4 << 1));
break;
case 'g':
printf(" POWER OPERATION\n");
printf("Enter the number to make power of base and exponent: ");
int base, exponent;
long long power = 1;
int j;
scanf("%d", &base);
scanf("%d", &exponent);
for(j=1; j<=exponent; j++)
{
power = power * base;
}

printf("%d ^ %d = %lld", base, exponent, power);
break;
case 'h':
printf("AND OPERATION\n");
printf("Enter the numbers to perform AND operation: ");
int a,b;
scanf("%d", &a);
scanf("%d", &b);
printf("a&&b = %d\n", a&&b);
break;
case 'i':
printf(" OR OPERATION\n");
printf("Enter the numbers to perform OR operation: ");
int a1,b1;
scanf("%d", &a1);
scanf("%d", &b1);
printf("a||b = %d\n", a1||b1);
break;
case 'j':
printf(" COUNT OF SET BITS\n");
printf("Enter the numbers to perform count of set bits: ");
int n,count3 = 0;
scanf("%d",&n);
while (n) {
n &= (n - 1);
count3++;
}
printf("\n count of set bits of count= %d\n",count3);
break;
case 'k':
printf("KPI:\n");
printf("Last operation is :\n");
printf("Total no of Operations = %d\n",count);
break;
case 'q':
printf(" SHUTTING DOWN\n");
break;

default:
printf("\nEnter Valid Operator!!!\n");
printf("\n\nPress Enter Again for New Input\n");
}
printf("\n\n\n Please Press Enter to restart operation.....\n");
printf("\n");
printf(" ***********Waiting for your input ********** \n");
getch();
}
}