Salman Hasan Mim.c

//Exercises
//Problem -1)Write a C program to enter radius of a circle and find its diameter, circumference and area.

#include<stdio.h>
int main()
{
    float R,D,C,A;
    printf("Enter radius of circle: ");
    scanf("%f",&R);
    D=2*R;
    C=2*3.1416*R;
    A=3.1416*(R*R);
    printf("Diameter = %f\n",D);
    printf("Circumference = f\n",C);
    printf("Area= %f \n",A);
    return 0;
}

//Problem -2) Write a C program to enter temperature in Celsius and convert it into Fahrenheit.

#include<stdio.h>
int main()
{
    double C,F;
    printf("Enter temperature in Celsius= ");
    scanf("%lf",&C);
    F = (((C*9)/5)+32);
    printf("The temperature in Fahrenheit is = %.2lf\n",F);
    return 0;
}

//Problem -3) Write a C program to enter temperature in Fahrenheit and convert to Celsius.

#include<stdio.h>
int main()
{
    double C,F;
    printf("Enter temperature in Fahrenheit = ");
    scanf("%lf",&F);
    C = (((F-32)/9)*5);
    printf("The temperature in Celsius is = %.2lf\n", C);
    return 0;
}

//Problem -4) Write a C program to enter base and height of a triangle and find its area.

#include<stdio.h>
int main()
{
    double B,H,A;
    printf("Enter Base & Height = ");
    scanf("%lf %lf",&B &H);
    A = 2/(B*H);
    printf("Area of the triangle is : %.2lf\n", A);
    return 0;
}

//Problem -5) Write a C program to enter marks of five subjects and calculate total, average and percentage.

#include<stdio.h>
int main()
{
    double A,B,C,D,E;
    double T, Av, Pr;
    scanf("%lf %lf %lf %lf %lf", %A,&B,&C,&D,&E);
    T=A+B+C+D+E;
    Av=T/5;
    P=T/5;
    printf("Total Number %.2lf\n",T)
    printf("Average Number is %.2lf\n",Av);
    printf("Percentage of the Number is %.2lf%%\n",P);
    return 0;
}

//Problem -6) Write a C program to enter two numbers and perform all arithmetic operations.

#include<stdio.h>
int main()
{
    int A,b,sum,sub,mut,mod;
    float div;
    scanf("%d %d", &A,&B);
    sum = A+B;
    sub = A-B;
    mut = A*B;
    mod = A%B;
    div = A/B;
    printf("Sum is : %d\n", sum);
    printf("Subtract is : %d\n", sub);
    printf("Multiple is : %d\n", mut);
    printf("Modulus is : %d\n", mod);
    printf("Divided is : %.2lf\n", div);
    return 0;
}

//Problem -7) Write a C program to enter length and breadth of a rectangle and find its perimeter.

#include<stdio.h>
int main()
{
    double l,b,p;
    scanf("%lf %lf",&l,&b);
    p=(2*(l+b));
    printf("Perimeter of the rectangle is : %.2lf\n",p);
    return 0;
}

//Problem -8) Write a C program to enter length and breadth of a rectangle and find its area.

#include<stdio.h>
int main()
{
    double l,b,a;
    scanf("%lf %lf",&l,&b);
    a=(l*b);
    printf("Area of the rectangle is : %.2lf\n",a);
    return 0;
}

//Problem -9) Write a C program to enter radius of a circle and find its diameter, circumference and area.

#include<stdio.h>
int main()
{
    float R,D,C,A;
    printf("Enter radius of circle: ");
    scanf("%f",&R);
    D=2*R;
    C=2*3.1416*R;
    A=3.1416*(R*R);
    printf("Diameter = %f\n",D);
    printf("Circumference = f\n",C);
    printf("Area= %f \n",A);
    return 0;
}

//Problem -10) Write a C program to enter length in centimeter and convert it into meter and kilometer.

#include<stdio.h>
int main()
{
    int cm, m, km;
    scanf("%d", &cm);
    m = cm/100;
    km = m/1000;
    printf("Meter = %d\n",m);
    printf("Kilometer = %d\n",km);

    return 0;
}

//Problem -11) Write a C program to enter temperature in Celsius and convert it into Fahrenheit.

#include<stdio.h>
int main()
{
    double C,F;
    printf("Enter temperature in Celsius= ");
    scanf("%lf",&C);
    F = (((C*9)/5)+32);
    printf("The temperature in Fahrenheit is = %.2lf\n",F);
    return 0;
}

//Problem -12) Write a C program to enter temperature in Fahrenheit and convert to Celsius.
#include<stdio.h>
int main()
{
    double C,F;
    printf("Enter temperature in Fahrenheit = ");
    scanf("%lf",&F);
    C = (((F-32)/9)*5);
    printf("The temperature in Celsius is = %.2lf\n", C);
    return 0;
}

//Problem -13) Write a C program to convert days into years, weeks and days.

#include<stdio.h>
int main()
{
    int d;
    float y,w;
    scanf("%d",&d);
    y = d/365;
    w = d/7;
    printf(" Days : %d\n", d);
    printf(" Weeks : %.2lf\n", w);
    printf(" Years : %.2lf\n", y);

    return 0;
}

//Problem -14) Write a C program to find power of any number x ^ y.

#include <stdio.h>
#include <math.h>
int main()
{
    int x, y, z; // z =x^y;

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

    z = pow(x,y);

    printf("%d^%d=%d", x,y,z);

    return 0;
}

//Problem -15) Write a C program to enter any number and calculate its square root.

#include <stdio.h>
#include <math.h>
int main()
{
    int x;
    double sqrx;
    scanf("%d", &x);

    sqrx = sqrt(x);

    printf("Square root of %d is %.2lf\n", x, sqrx);

    return 0;
}

//Problem -16) Write a C program to enter two angles of a triangle and find the third angle.

#include <stdio.h>
int main()
{
    int a,b,c,d;
    scanf("%d %d",&a,&b);

    c = a+b;
    d = 180-c;

    printf("Third angle of the triangle is %d\n", d);

    return 0;
}

//Problem -17) Write a C program to enter base and height of a triangle and find its area.

#include<stdio.h>
int main()
{
    double b,h,a;

    printf("Enter Base=");
    scanf("%lf",&b);
    printf("Enter Height=");
    scanf("%lf",&h);

    a = (b*h)/2;

    printf("Area of the triangle is : %.2lf\n", a);

    return 0;
}

//Problem -18) Write a C program to calculate area of an equilateral triangle.

#include <stdio.h>
#include <math.h>
int main()
{
    int x;
    double a;
    scanf("%d", &x);

    a = (sqrt(3)/4)*(x*x);

    printf("Area of an equilateral triangle is %.2lf\n", a);

    return 0;
}

//Problem -19) Write a C program to enter marks of five subjects and calculate total, average and percentage.

#include<stdio.h>
int main()
{
    double a, b, c, d, e;
    double t,a,p;
    scanf("%lf %lf %lf %lf %lf", &a,&b,&c,&d,&e);

    t=a+b+c+d+e;
    a=total/5;
    p=total/5;

    printf("Total Number is %.2lf\n",t);
    printf("Average Number is %.2lf\n",a);
    printf("Percentage of the Number is %.2lf%%\n",p);

    return 0;
}