Something

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
float main(void)
{
int No_1;
int No_2;
int sum;
int sub;
float div;
int mul;
int inc1;
int inc2;
int dec1;
int dec2;
int x;
printf("Please Select an Operation");
printf("\n1- Sum");
printf("\n2- Sub");
printf("\n3- Multi");
printf("\n4- Div");
printf("\n5- Inc");
printf("\n6- Dec\n");
scanf("%d",&x);
printf("Please Enter First Number\n");
scanf("%d",&No_1);
printf("Please Enter Second Number\n");
scanf("%d",&No_2);
if (x==1)
{
sum=No_1+No_2;
printf("%d+%d=%d\n",No_1,No_2,sum);
getch();
}
else if (x==2)
{
sub=No_1-No_2;
printf("%d-%d=%d\n",No_1,No_2,sub);
getch();
}
else if (x==4)
{
div=No_1/No_2;
printf("%d/%d=%f\n",No_1,No_2,div);
getch();
}
else if (x==3)
{
mul=No_1*No_2;
printf("%d*%d=%d\n",No_1,No_2,mul);
getch();
}
else if (x==5)
{
inc1=++No_1;
inc2=++No_2;
printf("First No.+1=%d",inc1);
printf("\nSecond No.+1=%d",inc2);
getch();
}
else
{
dec1=--No_1;
dec2=--No_2;
printf("\nFirst No.-1=%d",dec1);
printf("\nSecond No.-1=%d",dec2);
getch();
}
return 0;
}