C Instruction Programming

  1.  Write a program to display value of a+b, if a=5, b=2, in C language.
    #include <stdio.h>
    int main()
    {
    int a = 5;
    int b = 2;
    int sum = a+b;
    printf(" a+b= %d", sum);
    return 0;
    }




  2. Write a program If a=4 then find the value of a2 in C language.
    #include <stdio.h>
    int main()
    {
        int a = 4;
        int squared = a * a;
        printf("The square of 4 is %d\n", squared);
        return 0;
    }





  3. Write a program take one integer from user and find cube value in C language.
    #include <stdio.h>
    int main()
    {
        int x;
        printf("Enter an Integer: ");
        scanf("%d", &x);
        int cube = x * x * x;
        printf("The cube of %d is %d\n", x, cube);
        return 0;
    }





  4. Write a program If a=100 then find the square root of ‘a’ in C language.
    #include<stdio.h>
    #include<math.h>
    int main()
    {
        double a = 100;
        printf("\n The square root of %lf is %lf,", a, sqrt(a));
        return 0;
    }


    here if code did not compile then you need to put as

    $gcc fun.c -lm




  5. Write a program If a=5, b=6 then find the value of a 2 +b 2 in C language.
    #include <stdio.h>
    int main()
    {
        int a = 5;
        int b = 6;
        int result = a*a + b*b;
        printf("The value of given expression is: %d", result);
        return 0;
    }





  6. Write a program take 1 integer from user and check it is positive and negative in C language.
    #include <stdio.h>
    int main()
    {
        int a;
        printf("Enter an integer: ");
        scanf("%d", &a);
        if(a>0)
         {
                printf("%d It is positive number", a);
    }
        else
        {
            printf("%d It is negative number", a);
        }
        return 0;
    }





  7. Write a program take 1 integer from user and check it is multiple of 5 or not in C language.
    #include<stdio.h>
    int main()
    {
        int a;
        printf("Enter an integer: ");
        scanf("%d", &a);
        if(a % 5 == 0)
        {
            printf("%d is multiple of 5", a);
        }
        else
        {
            printf("%d is not multiple of 5", a);
        }
        return 0;
    }





  8. If a five-digit number is input through the keyboard, write a program to calculate the sum of its. digit.
    #include<stdio.h>
    int main(){
    int num, sum=0;
    printf("Enter five number:");
    scanf("%d",&num);

    sum+=(num/10000)%10;
    sum+=(num/1000)%10;
    sum+=(num/100)%10;
    sum+=(num/10)%10;
    sum+=num%10;

    printf("Sum of each digit is %d",sum);

    return 0;
    }




  9. If a five digit number is input through the keyboard, write  program to reverse  the number.
    #include<stdio.h>
    int main(){
    int num, sum=0;
    printf("Enter five number:");
    scanf("%d",&num);


    printf("Sum of each digit is %d%d%d%d%d",
    num%10,
    (num/10)%10,
    (num/100)%10,
    (num/1000)%10,
    (num/10000)%10
    );

    return 0;
    }





  11. If length of three side of triangle are input through the keyboard, write a program to find the area of the triangle.
    #include<stdio.h>
    #include<math.h>
    int main(){
    float a,b,c,semiperimeter,area,s;

    printf("Enter 3 side of number:\n");
    scanf("%f%f%f",&a,&b,&c);

    semiperimeter=(a+b+c)/2;
    s=semiperimeter;

    area=sqrt(s*((s-a)*(s-b)*(s-c)))*1.1;

    printf("total area is %f",area);





    return 0;
    }





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