Source Code

#include<stdio.h>
int main()
{
    int a,b,c;
    float x;
    printf("\nEnter 2 Nos : ");
    scanf("%d%d",&a,&b);
    c=a+b;
    printf("\nTotal : %d",c);
    c=a-b;
    printf("\nDifference : %d",c);
    c=a*b;
    printf("\nMul : %d",c);
    x=(float)a/(float)b;
    printf("\nDiv : %0.2f",x);
    c=a%b;
    printf("\nMod : %d",c);
    return 0;
}

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Output

Enter 2 Nos : 25 10
Total : 35
Difference : 15
Mul : 250
Div : 2.50
Mod : 5

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Question-1 :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.

Source Code

#include<stdio.h>
int main()
{
    float bs,da,hra,gs;
    printf("\nEnter Your Basic Salary : ");
    scanf("%f",&bs);
    da=bs*0.4;
    hra=bs*0.2;
    gs=bs+da+hra;
    printf("\nBasic Salary : %0.2f",bs);
    printf("\nDA : %0.2f",da);
    printf("\nHRA : %0.2f",hra);
    printf("\nGross Salary : %0.2f",gs);
    return 0;
}

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Output

Enter Your Basic Salary : 10000

Basic Salary : 10000.00
DA : 4000.00
HRA : 2000.00
Gross Salary : 16000.00

Question-2 :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.

Source Code

#include<stdio.h>
int main()
{
    float km,m,cm,ft,i;
    printf("Enter The Kilometer : ");
    scanf("%f",&km);
    m=km*1000;
    cm=m*100;
    i=cm/2.54;
    ft=i/12;
    printf("\n KM : %0.2f",km);
    printf("\n M  : %0.2f",m);
    printf("\n CM : %0.2f",cm);
    printf("\n IN : %0.2f",i);
    printf("\n FT : %0.2f",ft);
    return 0;
}

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Output

Enter The Kilometer : 30

 KM : 30.00
 M  : 30000.00
 CM : 3000000.00
 IN : 1181102.38
 FT : 98425.20

Question-3 :If the marks obtained by a student in five different subjects are input through the keyboard, 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.

Source Code

#include<stdio.h>
int main()
{
    int m1,m2,m3,m4,m5,total;
    float avg;
    printf("\nEnter Five Marks : ");
    scanf("%d%d%d%d%d",&m1,&m2,&m3,&m4,&m5);
    total=m1+m2+m3+m4+m5;
    avg=total/5.0;
    printf("\nTotal : %d",total);
    printf("\nAverage : %0.2f",avg);
    return 0;
}

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Output

Enter Five Marks : 75
78
98
85
99
Total : 435
Average : 87.00

Question-4 :Temperature of a city in Fahrenheit degrees is input through the keyboard. Write a program to convert this temperature into Centigrade degrees.

Source Code

/*
(32°F - 32)*5/9
*/
#include<stdio.h>
int main()
{
    float f,c;
    printf("\nEnter The Temperature : ");
    scanf("%f",&f);
    c=(f-32)*(5.0/9.0);
    printf("\nResult : %f",c);

    return 0;
}

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Output

Enter The Temperature : 100
Result : 37.777779

Question-5 :The length & breadth of a rectangle and radius of a circle are input through the keyboard. Write a program to calculate the area & perimeter of the rectangle, and the area & circumference of the circle

Source Code

#include<stdio.h>
int main()
{
    float l,b,r_area,r_peri,r,c_area,cir;
    printf("\nEnter Length & Breadth :");
    scanf("%f%f",&l,&b);
    printf("\nEnter Radius :");
    scanf("%f",&r);
    r_area=l*b;
    r_peri=(2*(l+b));
    c_area=3.14*r*r;
    cir=2*3.14*r;
    printf("\nArea of Rectangle : %0.2f",r_area);
    printf("\nPerimeter of Rectangle : %0.2f",r_peri);
    printf("\nArea of Circle : %0.2f",c_area);
    printf("\nCircumference of Circle : %0.2f",cir);

    return 0;
}

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Output

Enter Length & Breadth :10 20
Enter Radius :5
Area of Rectangle : 200.00
Perimeter of Rectangle : 60.00
Area of Circle : 78.50
Circumference of Circle : 31.40

Question-6 :Two numbers are input through the keyboard into two locations C and D. Write a program to interchange the contents of C and D.

Source Code

#include<stdio.h>
int main()
{
    int a,b;
    printf("\nEnter 2 Nos : ");
    scanf("%d%d",&a,&b);//5 10
    printf("\n A : %d   B : %d",a,b);
    a=a+b;//15
    b=a-b;//5
    a=a-b;//10
    printf("\n A : %d   B : %d",a,b);
    return 0;
}
/*
a=a*b;
b=a/b;
a=a/b;
*/

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Output

Enter 2 Nos : 10 15
 A : 10   B : 15
 A : 15   B : 10

Question-7 :If a five-digit number is input through the keyboard, write a program to calculate the sum of its digits. (Hint: Use the modulus operator ‘%’)

Source Code

#include<stdio.h>
int main()
{
    int a,b,d,f,sum=0;
    printf("\nEnter 5 Digit No : ");
    scanf("%d",&a);//12345
    b=a/10;//1234
    sum+=a%10;//5
    d=b/10;//123
    sum+=b%10;//4
    f=d/10;//12
    sum+=d%10;//3
    sum+=f/10;//1
    sum+=f%10;//2
    printf("\nTotal : %d",sum);
    return 0;
}

/*
 int a,b,c,d,e,f,g,h,i,sum=0;
    printf("\nEnter 5 Digit No : ");
    scanf("%d",&a);//12345
    b=a/10;//1234
    c=a%10;//5
    sum+=c;//sum=sum+5
    d=b/10;//123
    e=b%10;//4
    sum+=e;
    f=d/10;//12
    g=d%10;//3
    sum+=g;
    h=f/10;//1
    sum+=h;
    i=f%10;//2
    sum+=i;
    printf("\nTotal : %d",sum);
    return 0;
*/

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Output

Enter 5 Digit No : 12345
Total : 15

Question-8 :If a five-digit number is input through the keyboard, write a program to reverse the number

Source Code

#include<stdio.h>
int main()
{
    int a,b,c,d,e,f,g,h,i,result;
    printf("\nEnter 5 Digit No : ");
    scanf("%d",&a);//12345
    b=a/10;//1234
    c=a%10;//5
    d=b/10;//123
    e=b%10;//4
    f=d/10;//12
    g=d%10;//3
    h=f/10;//1
    i=f%10;//2
    result=(c*10000)+(e*1000)+(g*100)+(i*10)+h;
    printf("\nReverse of 5 Digit No %d is  : %d",a,result);

    return 0;
}

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Output

Enter 5 Digit No : 12345
Reverse of 5 Digit No 12345 is  : 54321