Q: (d) Write a program to receive Cartesian co-ordinates (x, y) of a point and convert them into polar co-ordinates (r, ). Hint: r = sqrt ( x2 + y2 ) and 𝝫 = tan-1 ( y / x )
#include <stdio.h>
#include<math.h>
int main()
{
double x,y,r,p;
printf("Enter Cartesian Co-ordinates x,y :\n");
scanf("%lf%lf", &x,&y);
r=sqrt(x*x+y*y);
p=atan(y/x);
printf("Polar Co-ordinates are ( %lf , %lf )",r,p);
return 0;
}
Q: (c) If lengths of three sides of a triangle are input through the keyboard, write a program to find the area of the triangle.
#include <stdio.h>
#include<math.h>
int main()
{
double a, b, c, s, area;
printf("Enter the length of side a:\n");
scanf("%lf", &a);
printf("Enter the length of side b:\n");
scanf("%lf", &b);
printf("Enter the length of side c:\n");
scanf("%lf", &c);
s = (a + b + c) / 2;
area = sqrt(s * (s - a) * (s - b) * (s - c));
printf("The area of the triangle is: %lf", area);
return 0;
}
C Programming Solved Problems Let us C Yashwant Kanitkar Chapter 2
Q:(b)If a five-digit number is input through the keyboard, write a
program to reverse the number.
#include <stdio.h>
int main()
{
long int n;
int s=0,r;
printf("Enter Number\n");
scanf("%ld",&n);
while(n>0)
{
r=n%10;
s=s*10+r;
n=n/10;
}
printf("Reverse of Number is %d",s);
return 0;
}
Q:(f) Paper of size A0 has dimensions 1189 mm x 841 mm. Each subsequent size A(n) is defined as A(n-1) cut in half parallel to its shorter sides. Thus paper of size A1 would have dimensions 841 mm x 594 mm. Write a program to calculate and print paper sizes A0, A1, A2, … A8.
#include <stdio.h>
int main()
{
double a[9][2]={{1189,841}};
int i,j;
for(i=1;i<=8;i++)
{
for(j=0;j<=0;j++)
{
if(a[i-1][j]>a[i-1][j+1])
{
a[i][j+1]=a[i-1][j]/2;
a[i][j]=a[i-1][j+1];
}
else
{
a[i][j+1]=a[i-1][j+1]/2;
a[i][j]=a[i-1][j];
}
}
}
for(i=0;i<=8;i++)
{
for(j=0;j<=1;j++)
{
printf("%lf\t",a[i][j]);
}
printf("\n");
}
return 0;
}
Q: (e) The length and breadth of a rectangle and radius of a circle are input through the keyboard. Write a program to calculate the area and perimeter of the rectangle, and the area and circumference of the circle.
#include <stdio.h>
int main()
{
double l,b,arearec,perirec,r,areacir,circumcir;
printf("Enter Length & Breadth of Rectangle\n");
scanf("%lf%lf",&l,&b);
printf("Enter Radius of Circle\n");
scanf("%lf",&r);
arearec=l*b;
perirec=2*(l+b);
areacir=3.14*r*r;
circumcir=2*3.14*r;
printf("Area of Rectangle is %lf\n",arearec);
printf("Perimeter of Rectangle is %lf\n",perirec);
printf("Area of Circle is %lf\n",areacir);
printf("Circumference of Circle is %lf\n",circumcir);
return 0;
}
Q: (d) Temperature of a city in Fahrenheit degrees is input through the keyboard. Write a program to convert this temperature into Centigrade degrees.
#include <stdio.h>
int main()
{
double f, c;
printf("Enter temperature in Fahrenheit: ");
scanf("%lf", &f);
c=(f - 32) * 5.0 / 9.0;
printf("%lf Fahrenheit is equal to %lf Celsius\n", f, c);
return 0;
}
Q: (c) If the marks obtained by a student in five different subjects are input through the keyboard, write a program to find out the aggregate marks and percentage marks obtained by the student. Assume that the maximum marks that can be obtained by a student in each subject is 100.
/*Q: (c) If the marks obtained by a student in five different subjects are input through the keyboard,
write a program to find out the aggregate marks and percentage marks obtained by the student.
Assume that the maximum marks that can be obtained by a student in each subject is 100.*/
#include<stdio.h>
#include<conio.h>
void main()
{
double m1,m2,m3,m4,m5,tot,per;
clrscr();
printf("Enter Marks in 5 Subjects out of 100 each\n");
printf("Enter Marks in Subject 1\n");
scanf("%lf",&m1);
printf("Enter Marks in Subject 2\n");
scanf("%lf",&m2);
printf("Enter Marks in Subject 3\n");
scanf("%lf",&m3);
printf("Enter Marks in Subject 4\n");
scanf("%lf",&m4);
printf("Enter Marks in Subject 5\n");
scanf("%lf",&m5);
tot=m1+m2+m3+m4+m5;
per=tot/5;
printf("Total Marks = %lf\n",tot);
printf("Percentage = %lf",per);
getch();
}
Q: (b) The distance between two cities (in km.) is input through the keyboard. Write a program to convert and print this distance in meters, feet, inches and centimeters.
/*Q: (b) The distance between two cities (in km.) is input through the keyboard.
Write a program to convert and print this distance in meters, feet, inches and centimeters.*/
#include<stdio.h>
#include<conio.h>
void main()
{
double dkm,dm,dcm,dft,din;
clrscr();
printf("Enter Distance in KM");
scanf("%lf",&dkm);
dm=dkm*1000;
dcm=dm*100;
din=dcm*0.3937;
dft=dcm*0.0328;
printf("Distance in CM = %lf\n",dcm);
printf("Distance in Inches = %lf\n",din);
printf("Distance in Feet = %lf\n",dft);
printf("Distance in Meter = %lf",dm);
getch();
}
Q: (a) Ramesh’s basic salary is input through the keyboard. His dearness
allowance is 40% of basic salary, and house rent allowance is 20% of
basic salary. Write a program to calculate his gross salary.
Solution:
/*(a) Ramesh’s basic salary is input through the keyboard. His dearness
allowance is 40% of basic salary, and house rent allowance is 20% of
basic salary. Write a program to calculate his gross salary.*/
#include<stdio.h>
#include<conio.h>
void main()
{
double b_sal,da,hra,g_sal;
clrscr();
printf("Enter basic salary");
scanf("%lf",&b_sal);
hra=0.20*b_sal;//House Rent Allowance
da=0.40*b_sal;//Dearness Allowance
g_sal=b_sal+da+hra;//Gross Salary
printf("Gross Salary = %lf",g_sal);
getch();
}
