subtraction of 2 variables

 #include<stdio.h>  

int main()        

{

    int a;      

    int b;

    printf("enter the first number a\n");

    scanf("%d", &a);

    printf("enter the second number b\n");

    scanf("%d", &b);

    printf("the answer is %d\n", a-b);    

    return 0;

}

// project:_3 (substraction)

#include <stdio.h>

int main ()

{

    int a,b,c,d;

    printf ("enter the first number: ");

    scanf ("%d", &a);

    printf ("enter the second number: ");

    scanf ("%d", &b);

    printf ("the first result is:%d\n",a-b);

    // jab bhi result print karana ho then scanf use nhi karte.

    // because scanf ka  use user se input lene ko karte he.

    printf ("enter the third number: ");

    scanf ("%d", &c);

    printf ("enter the fourth number: ");

    scanf ("%d", &d);

    printf ("the second result is:%d\n",c-d);

    // result print karate time result epression ke sath,

    // corresponding data type symbol ka bhi use use karne parhi programme

execute hoga.

    printf ("the ultimate result is:%d\n",(a-b)-(c-d));

   

    return 0;

}

output:_

enter the first number: 50 enter the second number: 40 the first result is:10 enter the third number: 60 enter the fourth number: 30 the second result is:30 the ultimate result is:-20