#include <stdio.h>
#include <stdlib.h>
main()
{
int add(int, int);
int sub(int, int);
int mul(int, int);
int division(int, int);
int a;
int b;
int c;
int s;
printf("add is 1\n");
printf("sub is 2\n");
printf("mul is 3\n");
printf("div is 4\n");
printf("Select it:");
scanf("%d",&s);
printf("input two Number: ");
scanf("%d %d",&a,&b);
switch(s)
{
case 1:
c=add(a,b);
printf("a+b ===--> %d\n",c);
break;
case 2:
c=sub(a,b);
printf("a-b ===--> %d\n",c);
break;
case 3:
c=mul(a,b);
printf("a*b ===--> %d\n",c);
break;
case 4:
c=division(a,b);
printf("a/b ===--> %d\n",c);
break;
}
system("pause");
}
int add(int x, int y)
{
return (x+y);
}
int sub(int x, int y)
{
return (x-y);
}
int mul(int x, int y)
{
return (x*y);
}
int division(int x, int y)
{
return (x/y);
}