working with c programming variable

                                       WORKING C PROGRAMMING WITH VARIABLE

EXAMPLE 1: VARIABLE DECLARATION AND INITIALIZATION
#include<stdio.h>

int main()
{
//DECLARATION
    int a;
    int b;
    int c;
//INITIALIZATION
    a=10;
    b=20;
    c=30;
//PRINT RESULT
    printf("%d\n",a+b+c);

    return 0;
}

RESULT: 60

EXAMPLE 2: ASCII VALUES

#include<stdio.h>

int main()
{

    printf("Ascii value of 'A' is: %d\n",'A');
    printf("Ascii value of '@' is: %d\n",'@');

    return 0;
}

RESULT:

Ascii value of ‘A’ is: 64

Ascii value of ‘@’ is: 65


EXAMPLE 3:AVERAGE

#include<stdio.h>

int main()
{

   double x,y,z,avg;

   x=10;
   y=20;
   z=30;
   avg=(x+y+z)/3;
   printf("Average of x, y and z is: %lf\n",avg);

    return 0;
}

RESULT:
Average of x, y and z is:20


EXAMPLE 4:  Print “NIGERIA” without quotation sign by using ascii values.
[Use the given ascii values- N=78, I=73, G=71, E=69, R=82, I=73, A=65.]

#include<stdio.h>

int main()
{

    printf("%c%c%c%c%c%c%c%c%c%c\n",66,97,110,103,108,97,100,101,115,104);


    return 0;
}

RESULT:NIGERIA

EXAMPLE 5: Precession
MUSA got 65.00 on physics, 83.50 on mathematics, 85.75 on C programming and 67.50 on English.
 Now write a program to calculate the average of his marks on 4 subjects and print it up to 2 digit after the decimal point.
 [The result should look like: XX.XX]


#include<stdio.h>

int main()
{

   double marksInPhysics,marksInMath,marksInC,marksInEng,avarage;

   marksInPhysics = 65.00;
   marksInMath = 83.50;
   marksInC = 85.50;
   marksInEng = 67.50;
   avarage=(marksInPhysics + marksInMath + marksInC + marksInEng)/4;

   printf("%.2lf\n",avarage);

    return 0;
}

RESULT:
75.38