CHAPTER-1 Overview of C

CHAPTER-1 Overview of C 

Problem exercise no 1.1&1.2: 
Coding of the programme:

 #include<stdio.h>
 void main()
 {
 printf("---------------------------------------\n");
printf("I  First line :Humayun Kabir  I\nI  Second line : Sector#10, Road#11, House#18 I\nI  Third line:Uttara, Dhaka-1230I\n");
printf("---------------------------------------");
}
Output:

Problem exercise no. 1.3:
 Coding of the programme:

 #include<stdio.h>
void main()
{
 printf("*\n* *\n* * *\n* * * * ");
}
Output:
*
* *
* * *
* * * *

Problem exercise no :1.4 
Coding of the problem: 

#include<stdio.h>
void main()
 {
printf("a>>------------------>b");
}
 Output: a>>------------------>b

Problem exercise no:1.5
 Coding of the problem:

 #include<stdio.h>
#define pi 3.14159
void main()
{
 float r,A; printf("\n\tENTER THE RADIUS OF A CIRCLE=");
 scanf("%f",&r); A=pi*r*r;
 printf("\n\n\tArea=%f sqr unit",A);
 }
 Output: ENTER THE RADIUS OF A CIRCLE=2

Area=12.566360 sqr unit

 Problem exercise no:1.6
 CODING: 

#include<stdio.h>
 void main()
 {
int b,c;
for(b=1;b<=10;b++)
 {
c=5*b;
 printf("\n\t%d*%d=%d\n",5,b,c);
 }
 }
 Output :
5 x 1= 5
5 x 2= 10
 5 x 3= 15
5 x 4= 20
5 x 5= 25
5 x 6= 30
 5 x 7= 35
5 x 8= 40
 5 x 9= 45
 5 x 10= 50

 Problem exercise no:1.7
 Coding of the programme:

 #include<stdio.h>
 void add();
 void sub();
void main()
 {
 add();
 sub();
 }
void add()
 {
 printf("\n\t%d+%d=%d",20,10,30);
}
 void sub()
{
 printf("\n\t%d-%d=%d",20,10,10);
 }
 Output :
              20+10=30      
              20-10=10

Problem exercise no:1.8 
Coding:

 #include<stdio.h>
 void main()
{
int a,b,c,x;
 printf("Enter values of a,b&c\n");
 scanf("%d%d%d",&a,&b,&c);
 x=a/(b-c);
 printf("result=%d",x);
 }
Output:
a) Enter values of a,b&c
 250
 85
25
result=4
 b)NO OUTPUT

 Problem exercise  no:1.9 
(b) Coding :

 #include<stdio.h>
 void main()
 {
float a,F,C;
printf("ENTER TEMPERATURE IN FARENHITE\n");
 scanf("%f",&F); a=5*(F-32); C=a/9;
 printf("\nIn celsius scale=%f",C);
 }
 Output :
 ENTER TEMPERATURE IN FARENHITE
10
 In Celsius scale=-12.222222

 Problem exercise  no:1.9
 (a) Coding :

 #include<stdio.h>
 void main()
 {
float a,F,C;
printf("ENTER TEMPERATURE IN CELSIUS\n");
 scanf("%f",&C); a=(9*C)/5; F=a+32;
 printf("\nIn farenhite scale=%f",F);
 }
 Output:
 ENTER TEMPERATURE IN CELSIUS
10
 In frenhite scale=50.00000


Problem exercise  no: 1.10
 Coding of the problem: 

#include<stdio.h>
 #include<math.h>
 void main()
 {
float a,b,c,S,A;
printf("\n\tENTER THE THREE SIDES OF A TRIANGLE=");
 scanf("%f%f%f",&a,&b,&c);
 S=(a+b+c)/2;
A=sqrt(S*(S-a)*(S-b)*(S-c));
 printf("\n\tArea of the triangle=%f",A);
 }
 Sample output:
       ENTER THE THREE SIDES OF A TRIANGLE=10
 12
 14
     Area of the triangle=58.787754

Problem exercise no:1.11
 Coding:

 #include<stdio.h>
#include<math.h>
void main()
 {
float D,x1,x2,y1,y2;
 printf("ENTER CO-ORDINATES x1,x2,y1,y2=\n");
scanf("%f%f%f%f",&x1,&x2,&y1,&y2);
D=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
 printf("Result=%f",D);
 }
Output :
ENTER CO-ORDINATES x1,x2,y1,y2=
 2
 4
 8
 5
Result=3.605551

 Problem exercise no:1.12 
Coding:

#include<stdio.h>
 #include<math.h>
 #define pi 3.14159

void main()
 {
float r,x1,x2,y1,y2,A;
x1=0;
 x2=0;
 y1=4;
y2=5;
r=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
 A=pi*r*r;
printf("Result=%f",A);
 }
Output :
 Result=3.14159

Problem exercise no:1.13
 Coding:

#include<stdio.h>
 #include<math.h>
 #define pi 3.14159
void main()
{
float D,r,x1,x2,y1,y2,A;
 x1=2;
 x2=2;
 y1=5;
 y2=6;
D=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
 r=D/2;
A=pi*r*r;
 printf("Result=%f",A);
 }
 Output :
 Result=0.785398

 Problem exercise no:1.14 
Coding:

 #include<stdio.h>
 void main()
{
 int a,b,c;
 a=5;
 b=8;
 c=18;
printf("%dx+%dy=%d",a,b,c);
}
Output :
            5x+8y=18

Problem exercise no:1.15
 Coding: 

#include<stdio.h>
 void main()
{
 float x,y,sum,difference,product,division;
 printf("ENTER TWO NUMBERS=\n");
scanf("%f%f",&x,&y);
sum=x+y;
difference=x-y;
product=x*y;
division=x/y; printf("\n\tSum=%f\tDifference=%f\n\n\tProduct=%f\tDivision=%f",sum,difference,product,divi sion);
}
 Output :
ENTER TWO NUMBERS=
10
 5
 Sum=15.000000                      Difference=5.000000

 Product=50.000000                Division=2.000000