Chapter 2 exercises and exercises in C language programming

[Exercise for 2-1]
# Include <stdio. h>
Int main (void)
{
Printf ("programming in C is even more fun! \ N ");
Return 0;
}
[Exercise for 2-2]
Printf ("programming is fun. And programming in C is even more fun! \ N ");
# Include <stdio. h>
Int main (void)
{
Printf ("programming is fun. And programming in C is even more fun! \ N ");
Return 0;
}
[Exercise 2-3]
****
***
**
*
# Include <stdio. h>
Int main (void)
{
Printf ("***** \ n ");
Printf ("*** \ n ");
Printf ("** \ n ");
Printf ("* \ n ");
Return 0;
}
[Exercise 2-4]
# Include <stdio. h>
Int main (void)
{
Int Celsius, Fahr;
Fahr = 150;
Celsius = 5 * (fahr-32)/9;
Printf ("Fahr = % d, Celsius = % d \ n", Fahr, Celsius );
Return 0;
}
[Exercise 2-5]
No. It is not recognized by the computer. It will affect the division operation between integers.
[Exercise 2-6]
# Include <stdio. h>
# Include <math. h>
Int main (void)
{
Int h;
Float A, T;
H = 100;
A = 2 * H/10;
T = SQRT ();
Printf ("H = % d, t = %. 2f \ n", h, t );
Return 0;
}
[Exercise 2-7]
No.
[Exercise 2-8]
# Include <stdio. h>
Int main (void)
{
Int Celsius, Fahr;
Printf ("Enter Fahr :");
Scanf ("% d", & Fahr );
Celsius = 5 * (fahr-32)/9;
Printf ("Fahr = % d, Celsius = % d", Fahr, Celsius );
Return 0;
}
[Exercise 2-9]
# Include <stdio. h>
Int main (void)
{
Int A, B, C, D;
Printf ("enter :");
Scanf ("% d", & );
Printf ("Enter B :");
Scanf ("% d", & B );
Printf ("Enter C :");
Scanf ("% d", & C );
D = (a B C)/3;
Printf ("d = % d", d );
Return 0;
}
[Practice 2-10]
# Include <stdio. h>
Int main (void)
{
Double X, Y;
Printf ("Enter X :");
Scanf ("% lf", & X );
If (X! = 0)
{
Y = 1/X;
}
Else
{
Y = 0;
}
Printf ("Y = f (% F) = %. 3f", x, y );
Return 0;
}
[Exercise 2-11]
# Include <stdio. h>
# Include <math. h>
Int main (void)
{
Double X, Y;
Printf ("Enter X :");
Scanf ("% lf", & X );
If (x <0)
{
Y = POW (x, 5.0) x * 2 1/X;
}
Else
{
Y = SQRT (X );
}
Printf ("Y = f (% F) = %. 2f", x, y );
Return 0;
}
[Exercise 2-12]
# Include <stdio. h>
Int main (void)
{
Int lower, upper, Fahr;
Double Celsius;
Printf ("Enter lower :");
Scanf ("% d", & Lower );
Printf ("enter upper :");
Scanf ("% d", & upper );
Printf ("Fahr Celsius \ n ");
For (Fahr = lower; Fahr <= upper; Fahr = Fahr 2)
{
Celsius = (5.0/9.0) * (fahr-32 );
Printf ("% d %. 1f \ n", Fahr, Celsius );
}
Return 0;
}
[Exercise 2-13]
# Include <stdio. h>
Int main (void)
{
Int I, N;
Double sum;
Printf ("Enter N :");
Scanf ("% d", & N );
Sum = 0;
For (I = 1; I <= N; I)
{
Sums = sum 1.0/I;
}
Printf ("sum is %. 3f \ n", sum );
Return 0;
}
[Exercise 2-14]
# Include <stdio. h>
Int main (void)
{
Int I, n, denominator;
Double sum, item;
Printf ("Enter N :");
Scanf ("% d", & N );
Sum = 0;
For (I = 1; I <= N; I)
{
Denominator = 2 * I-1;
Item = 1.0/denominator;
Sum = sum item;
}
Printf ("sum is %. 3f", sum );
Return 0;
}
[Exercise 2-15]
# Include <stdio. h>
Int main (void)
{
Int I, n, denominator, flag;
Double item, sum;
Printf ("Enter N :");
Scanf ("% d", & N );
Flag = 1;
Sum = 0;
Denominator = 1;
For (I = 1; I <= N; I)
{
Item = flag * 1.0/denominator;
Sum = item sum;
Flag =-flag;
Denominator = Denominator 3;
}
Printf ("sum is %. 3f \ n", sum );
Return 0;
}
[Exercise 2-16]
# Include <stdio. h>
Int main (void)
{
Int m, n, I, sum;
Double A, B;
Printf ("Enter M :");
Scanf ("% d", & M );
Printf ("Enter N :");
Scanf ("% d", & N );
A = 1; B = 1;
For (I = 1; I <= m; I)
{
A = A * I;
}
For (I = 1; I <= N; I)
{
B = B * I;
}
Sum = a B;
Printf ("sum is % d \ n", sum );
Return 0;
}
[Exercise 2-17]
10
[Exercise 2-18]
# Include <stdio. h>
# Include <math. h>
Int main (void)
{
Int I, N;
Double product;
Printf ("Enter N :");
Scanf ("% d", & N );
For (I = 0; I <= N; I)
{
Product = POW (3, I );
Printf ("Pow (3, % d) = %. 0f \ n", I, product );
}
Return 0;
}
[Exercise 2-19]
# Include <stdio. h>
Double fact (int n );
Int main (void)
{
Int I, N;
Double result;
Printf ("Enter N :");
Scanf ("% d", & N );
For (I = 1; I <= N; I)
{
Result = fact (I );
Printf ("% d! = %. 0f \ n ", I, result );
}
Return 0;
}
Double fact (int n)
{
Int I;
Double product;
Product = 1;
For (I = 1; I <= N; I)
{
Product = product * I;
}
Return product;
}
[Exercise 2-20]
# Include <stdio. h>
Double fact (int n );
Int main (void)
{
Int M, N;
Double compose;
Printf ("m <= n \ n ");
Printf ("Enter M :");
Scanf ("% d", & M );
Printf ("Enter N :");
Scanf ("% d", & N );
Compose = fact (N)/fact (m)/fact (n-M );
Printf ("compose is %. 0f \ n", compose );
Return 0;
}
Double fact (int n)
{
Int I;
Double product;
Product = 1;
For (I = 1; I <= N; I)
{
Product = product * I;
}
Return product;
}
[Exercise 2-1]
# Include <stdio. h>
# Include <math. h>
Int main (void)
{
Int num1, num2, sum, difference;
Double accumulate, quotient, surplus;
Printf ("Enter num1 :");
Scanf ("% d", & num1 );
Printf ("Enter num2 :");
Scanf ("% d", & num2 );
Sum = num1 num2;
Difference = num1-num2;
Accumulate = num1 * num2;
Quotient = num1/num2;
Surplus = fmod (num1, num2 );
Printf ("sum is % d \ ndifference is % d \ n", sum, difference );
Printf ("accumulate is %. 0f \ n", accumulate );
Printf ("quotient is %. 0f \ n", quotient );
Printf ("surplus is %. 0f \ n", surplus );
Return 0;
}
[Exercise 2-2]
# Include <stdio. h>
Int main (void)
{
Int X;
Double Y, result;
Printf ("Enter X :");
Scanf ("% d", & X );
If (x <= 50)
{
Y = 0.53;
}
Else
{
Y = 0.58;
}
Result = x * Y;
Printf ("result is %. 2f \ n", result );
Return 0;
}
[Exercise 2-3]
# Include <stdio. h>
Int main (void)
{
Int N, I;
Double X, product;
Printf ("Enter X :");
Scanf ("% lf", & X );
Printf ("Enter N :");
Scanf ("% d", & N );
Product = 1;
For (I = 1; I <= N; I)
{
Product = product * X;
}
Printf ("product is %. 2f \ n", product );
Return 0;
}
[Exercise 2-4]
# Include <stdio. h>
Int main (void)
{
Int m, n, I;
Double result, part;
Printf ("m <= n \ n ");
Printf ("Enter M :");
Scanf ("% d", & M );
Printf ("Enter N :");
Scanf ("% d", & N );
Result = 0;
For (I = m; I <= N; I)
{
Part = I * I 1.0/I;
Result = Result part;
}
Printf ("result is %. 2f \ n", result );
Return 0;
}
[Exercise 2-5]
# Include <stdio. h>
Int main (void)
{
Int flag, I, N;
Double sum, part, denominator;
Printf ("Enter N :");
Scanf ("% d", & N );
Flag = 1;
Sum = 0;
For (I = 1; I <= N; I)
{
Denominator = I * 2-1;
Part = flag * I/denominator;
Sum = sum part;
Flag =-flag;
}
Printf ("sum is %. 2f \ n", sum );
Return 0;
}
[Exercise 2-6]
# Include <stdio. h>
# Include <math. h>
Int main (void)
{
Int loan, month, year;
Double rate, money;
Printf ("Enter loan :");
Scanf ("% d", & Loan );
Printf ("Enter rate :");
Scanf ("% lf", & rate );
Month = 70;
Printf ("year money \ n ");
For (year = 5; year <= 30; Year)
{
Money = Loan * rate * POW (1 rate, month)/(POW (1 rate, month)-1 );
Month = Month 12;
Printf ("% 2.d % F \ n", year, money );
}
Return 0;
}
[Exercise 2-7]
# Include <stdio. h>
# Include <math. h>
Int main (void)
{
Int N, I, part, sum;
Printf ("Enter N :");
Scanf ("% d", & N );
Sum = 0;
For (I = 1; I <= N; I)
{
Part = POW (2, I );
Sum = sum part;
}
Printf ("sum is % d \ n", sum );
Return 0;
}
[Exercise 2-8]
# Include <stdio. h>
Double fact (int n );
Int main (void)
{
Int N, I, e, part;
Printf ("Enter N :");
Scanf ("% d", & N );
E = 0;
For (I = 0; I <= N; I)
{
Part = fact (I );
E = e part;
}
Printf ("e = % d \ n", e );
Return 0;
}
Double fact (int n)
{
Int I, product;
Product = 1;
For (I = 1; I <= N; I)
{
Product = product * I;
}
Return product;
}