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PRACTICAL 6

Exercise1.1a

The program will not work. Because int x,y is found outside the main function.

Exercise 1.2

#include

int main()

{

int x,y;

printf("\nEnter two numbers");

scanf("%d %d",&x,&y);

printf("\n\n%d is bigger",(x>y)?x:y);

return 0;}

Exercise 1.3

if (x >=1 && x

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Exercise 1.7

if (age>=21 && age=65)

printf(The person is a senior citizen);

Exercise 1.8

#include

int main()

{

int x= 1;

if( x = 1)

printf(" x equals 1" );

else

printf(" x does not equal 1");

return 0;

}

Exercise 1.9

DECLARATION OF VARIABLES:

int i,j;

long ix ;

short s;

float x;

double dx;char c;

EXPRESSIONS:

(a) i + c int

(b) x + c float

(c) dx + x float

(d) ((int)dx) + ix int

(e) i + x float

(f) s + j int

(g) ix + j int(h) s + c int

(i) ix + c int

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Exercise 1.10

a) k = (i + j ) = 13

b) z = (x + y) = -0.005

c) i = j = 5

d) k = (x + y) = 0

e) k = c = garbage value

f) z = i / j = 1.600

g) a = b = d = d

h) i= j = 1.1 =1

i) z = k = x = 0.000

j) k = z = x = 0k) i += 2 = 10

l) y -= x = -0.015

m) x *= 2 =0.01

n) i /= j = 1

o) i %= j = 3

p) i += ( j - 2) = 11

Exercise 1.11

(a) scanf(%d%d%f%f,&i,&j.&x,&dx);

(b) scanf(%d%L%d%f%u,&i,&ix,&j,&x,&u);

(c) scanf(%d%u%c,&i,&u,&c);

(d) scanf(%c%f%f%f,&c,&x,&dx,&s);

Exercise 1.12

#include

Float x,y,z;

(a) Printf(x, y and z are %f, %f and %f, x, y, z);

(b) Printf(x+y is equal to %f, and x-z is equal to %f,(x+y), (x-y));(c) Printf(The squareroot of (x+y) is %f and the absolute value of (x-z) is %f,

sqrt(x+y), Fabs(x-z));

Exercise 1.13

#include

int main()

{

int n=0, sum=0, i=1;

printf("Enter a number. : ");

scanf("%d", &n);while(n>0)

{

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i = n%10;

printf("%d", i);

sum+= i; n = n/10;

}

printf("\nSum of the number is %d",sum);

return 0;}

Exercise 1.14

#include

int main()

{

int x,y;

printf("Enter a number: ");

scanf("%d", &x);

printf("Now enter a second number: ");

scanf("%d", &y);

if(x%y==0 && x>y)printf("x is evenly divisible by y");

else

printf("x is not evenly divisible by y");

return 0;

}

Exercise 1.15

#include

int main()

{

int x,y;

float div;div = x/y;

printf("Enter first number: ");

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scanf("%d", &x);

printf("Enter second number: ");

scanf("%d", &y);

if (y==0)

printf("NO SOLUTION!");

elseprintf("The answer is %5.3f\n", div);

return 0;

}

Exercise 1.16

#include

int main (int argc, const char * argv[])

{

int number, digit1, digit2, digit3, digit4, digit5;

printf("Enter a number (max 5 digits): ");

scanf("%i", &number);

if (number < 100000){

digit1 = number % 100000 / 10000;switch (digit1)

{

case 0 : printf("Zero "); break;

case 1 : printf("One "); break;

case 2 : printf("Two "); break;

case 3 : printf("Three "); break;

case 4 : printf("Four "); break;

case 5 : printf("Five "); break;

case 6 : printf("Six "); break;

case 7 : printf("Seven "); break;

case 8 : printf("Eight "); break;case 9 : printf("Nine "); break;

default : printf("Unknown Interger "); break;

}

digit2 = number % 10000 / 1000;

switch (digit2)

{





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case 8 : printf("Eight "); break;

case 9 : printf("Nine "); break;default : printf("Unknown Interger "); break;

}

digit3 = number % 1000 / 100;

switch (digit3)

{




case 3 : printf("Three "); break;case 4 : printf("Four "); break;





case 9 : printf("Nine "); break;


}

digit4 = number % 100 / 10;

switch (digit4)

{








case 7 : printf("Seven "); break;case 8 : printf("Eight "); break;

case 9 : printf("Nine "); break;


}

digit5 = number % 10;

switch (digit5)

{


case 1 : printf("One "); break;case 2 : printf("Two "); break;


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case 9 : printf("Nine "); break;default : printf("Unknown Interger "); break;

}

}

else

{

printf("Entered Number is too long.");

}

return 0;

}

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PRACTICAL TUTORIAL 7

NO 1.

#include

#include

int main()

{

int usenum;

printf("Type in your number: ");

scanf("%d", &usenum);

if(usenum < 0)

printf("The absolute value is %d \n", abs(usenum));

else

printf("The absolute value is %d \n", usenum);

return 0;

}

NO 2.

#include

int main()

{

int x;

printf("Type in a number: ");

scanf("%d", &x);

if(x%2 == 0)

printf("The number is even");

else

printf("The number is odd");

return 0;

}

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NO 3.

#include

int main()

{

int year;

printf("Enter a year: ");

scanf("%d", &year);

if (year%4 == 0 && year%100 == 0 && year%400 == 0)

printf("The year is a leap one");

else

printf("The year is not a leap one");

return 0;

}

NO 4.

#include

int main()

{int firstnum, secondnum;

printf("Enter first number:");

scanf("%d",&firstnum);

printf("\nEnter Second number:");

scanf("%d",&secondnum);

if (firstnum%secondnum==0)

if((firstnum/secondnum)%2==0)

printf("\nThe Frist number is evenly divisible by Second number\n");

else

printf("\nThe Frist number is NOT evenly divisible by Second number\n");

else

printf("\nThe Frist number is evenly divisible by Second number\n");

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return 0;

}

NO 5.

#include

int main()

{

int num1,num2;

float division;printf ("Enter First number:");

scanf ("%d",&num1);

while (num1==0)

{

printf ("Number Cannot be Zero\nEnter another number:");

scanf ("%d",&num1);

}

printf ("Enter Second number:");

scanf ("%d",&num2);

while (num2==0)

{

printf ("Number Cannot be Zero\nEnter another number:");

scanf ("%d",&num2);

}

division=(num1/num2);

printf ("Division of First and Second number=%.3f",division);

return 0 ;

}

NO 6.

#include

int main (void)

{

float accumulator, value;

char op;

printf ("Begin Calculations\n");

do

{

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scanf("%f %c", &value, &op);

switch (op)

{

case 'S':

accumulator = value;printf("= %f\n",accumulator);

break;

case '+':

accumulator = accumulator + value;

printf("= %f\n",accumulator);

break;

case '-':

accumulator = accumulator - value;

printf("= %f\n",accumulator);break;

case '*':

accumulator = accumulator * value;


break;

default:

printf ("Error! Unknown operator.\n");

}

}

while (op != 'E' );


printf("End of Caculations\n");

return 0;

}

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NO 7.

(a).

#include

int main()

{

int i, total;i = 2;

total = 0.0;

while(i

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NO 8.

(a).

#include

void main ()

{

int i, total, testnum;

total = 0;

for(i=2; i

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NO 1.

float do_it(char a, char b, char c)

NO 2.

void print_a_number(int num)

NO 3.

(a). int

(b). long

NO 4.

function does not take 1 arguments

no value to return

NO 5.

There should be no semicolon after "int twice(int y)".

NO 6.

#include

int main()

{

int product(int, int);

int x,y,xy;


scanf("%d", &x);


scanf("%d", &y);

xy = product(x,y);

printf("The product is %d\n", xy);

return 0;

}

int product(int a, int b)

{

int prod;prod = a*b;

return (prod);

}

NO 7.#include

float division(float, float);

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void main (void)

{

float firstnum, secnum;

float result;

printf ("Enter a value for first number:\n");scanf ("%f", &firstnum);

printf ("Enter a value for second number:\n");

scanf ("%f", &secnum);

division (firstnum, secnum);

result = firstnum/secnum;

if (secnum!=0)

printf ("The division of the 1st number by the 2nd number is %1.3f.\n",

result);

}

float division(float firstnum, float secnum)

{

if (secnum==0)

printf ("Error. A value cannot be divided by zero.\n");

else

{

float result = firstnum/secnum;

return (result);

}

}

NO 8.

#include

int main()

{

float average(float, float,float,float,float);

float a,b,c,d,e,ave;


scanf("%f", &a);printf("Enter second number: ");

scanf("%f", &b);

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printf("Enter third number: ");

scanf("%f", &c);

printf("Enter fourth number: ");

scanf("%f", &d);

printf("Enter fifth number: ");

scanf("%f", &e);

ave = average(a,b,c,d,e);

printf("The average is %f\n", ave);

return 0;

}

float average(float p, float q,float r,float s,float t)

{

float aver;

aver = (p+q+r+s+t)/5;

return (aver);

}

NO 8.

#include

#include

int power (int);

void main (void)

{

int x;

printf ("Enter a value:\n");

scanf ("%i", &x);

printf ("3 raised to the power of %i is %i.\n", x, power(x));

}

int power(int x)

{

if(x==0)

return 1;

else

return power(x-1)*3;

}

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NO 1.

Semicolon after function header must not be included

NO 2.The output would be: 4 16

The function show() has already returned the square of x to the main function. Hence

the second printf function and the return of cube x to the main are ignored.

NO 3.

The function will return the value of 1 to the main only if a=b AND a=c. Else if a!=b

and a!=c, or if a!=b but a=c, or if a=b but a!=c, the function will return the value of

zero to the main.

NO 4.

#include

int main(){

int maxnum(int, int);

int x,y,max;


scanf("%d", &x);


scanf("%d", &y);

max = maxnum(x,y);

return 0;

}

int maxnum(int a, int b)

{

int maxi;

if (a>=b)

maxi = a;

else

maxi = b;

printf("The larger number is %d\n", maxi);

return (maxi);

}

NO 5.

#include

int main()

{

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int maxnum(int, int, int);

int x,y,z, max;


scanf("%d", &x);


scanf("%d", &y);printf("Enter third number: ");

scanf("%d", &z);

max = maxnum(x,y,z);

return 0;

}

int maxnum(int a, int b, int c)

{

int maxi;

if (a>=b && a>=c)

maxi = a;else if (b>=a && b>=c)

maxi = b;

else

maxi = c;

printf("The largest number is %d\n", maxi);

return (maxi);

}

NO 6.

#include

#include

int main ()

{

int absolute(int);

int x, absol;

printf("Enter a value: ");

scanf("%d", &x);

absol = absolute(x);

printf("The absolute value of %d is %d\n", x, absol);

return 0;

}

absolute(int a)

{ int abst;

abst = abs(a);

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return (abst);

}

NO 7.

int f(int n)

{

int i = 1;

while (i < n)

i += i;

return i;

}

NO 8.

#include

int prime (int);

void main()

{

int n;

printf ("Enter a positive integer number you want to test: ");

scanf("%i", &n);

prime(n);

printf ("If '1' is displayed, then it is a prime.\n");printf ("If '0' is displayed, then it is not a prime.\n");

printf ("%i.\n", prime(n));

}

int prime (int n)

{

int i, c=0;

for(i=1; i

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NO 9.

#include

int prime (int);

void main()

{

int n;

printf ("Enter a positive integer number you want to test: ");

scanf("%i", &n);

prime(n);printf ("If '0' is displayed, then it is a prime.\n");

printf ("If '1' is displayed, then it is not a prime.\n");

printf ("%i.\n", prime(n));

}

int prime (int n)

{

int i, c=0;

for(i=1; i

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NO 13.

'{' : missing function header (old-style formal list?)

syntax error : missing ';' before identifier 'b'

syntax error : missing ';' before 'else'


NO 1.

NO 2.

NO 3.

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int P[150], i, j;

for(i=0; i

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{

int Table1[r][c],Table2[r][c];

int sum[r][c];

readinput(Table1,Table2);

computesums(Table1, Table2, sum);writeoutput(sum);

}

void readinput(int Table1[r][c],int Table2[r][c])

{

int i,j;

printf("For Table 1\n");

for (i=0; i

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