code for calculator with functions

#include"stdio.h"
#include"conio.h"
//declaration
void add(int,int);
void sub(int,int);
void mul(int,int);
void div(float,float);
void main()
{
    int a,b;
    printf("Enter two numbers\n");
    scanf("%d %d",&a,&b);
    add(a,b);
    sub(a,b);
    mul(a,b);
    div(a,b);
    getch();
}
//defination
void add(int a, int b)
{
    printf("Addition: %d",a+b);
    printf("\n");
}
//defination
void sub(int a, int b)
{
    printf("subtract: %d",a-b);
    printf("\n");
}
//defination
void mul(int a, int b)
{
    printf("Multiplication: %d",a*b);
    printf("\n");
}
//defination
void div(float a, float b)
{
    printf("Division: %.3f",a/b);
    printf("\n");
}

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