THE BAPATLA ENGINEERING COLLEGE:: BAPATLA DEPARTMENT OF MCA. Subject name: C programing Lab. Subject code: MCA 107. LAB manual of c programing lab

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1 THE BAPATLA ENGINEERING COLLEGE:: BAPATLA DEPARTMENT OF MCA Subject name: C programing Lab Subject code: MCA 107 LAB manual of c programing lab

2 1. Write a C program for calculating compound interest. #include<stdio.h> #include<conio.h> #include<math.h> void main() float p,r,t,ci; clrscr(); printf( Enter Principle, Rate and Time: ); scanf( %f%f%f,&p,&r,&t); ci=pow(p*(1+r/100),t); printf( Bank Loans Compound Interest = %f%,ci); getch();

3 2. Write a C program for calculating roots of a quadratic equation? #include <stdio.h> #include <math.h> /* This is needed to use sqrt() function.*/ int main() float a, b, c, determinant, r1,r2, real, imag; printf("enter coefficients a, b and c: "); scanf("%f%f%f",&a,&b,&c); determinant=b*b-4*a*c; if (determinant>0) r1= (-b+sqrt(determinant))/(2*a); r2= (-b-sqrt(determinant))/(2*a); printf("roots are: %.2f and %.2f",r1, r2); else if (determinant==0) r1 = r2 = -b/(2*a); printf("roots are: %.2f and %.2f", r1, r2); else real= -b/(2*a); imag = sqrt(-determinant)/(2*a); printf("roots are: %.2f+%.2fi and %.2f-%.2fi", real, imag, real, imag); return 0;

4 3. Write a C program for finding average of N numbers. #include<stdio.h> #include<conio.h> void main() int n, count; float sum = 0, x, avg; printf("\nenter How Many Numbers : "); scanf("%d", &n); for(count = 1; count <= n; count++) printf("x = "); scanf("%f", &x); sum += x; avg = sum / n; printf("\nthe Average of Numbers is : %0.2f", avg);

5 4. Write a C program to check whether the given number is prime or not? #include <stdio.h> int main() int n, i, flag=0; printf("enter a positive integer: "); scanf("%d",&n); for(i=2;i<=n/2;++i) if(n%i==0) flag=1; break; if (flag==0) printf("%d is a prime number.",n); else printf("%d is not a prime number.",n); return 0;

6 5. Write a C program to check weather given number is perfect number or not? #include<stdio.h> int main() int n,i=1,sum=0; printf("enter a number: "); scanf("%d",&n); while(i<n) if(n%i==0) sum=sum+i; i++; if(sum==n) printf("%d is a perfect number",i); else printf("%d is not a perfect number",i); return 0;

7 6. Write a C program to check weather given number is Armstrong number or not? #include <stdio.h> int main() int n, n1, rem, num=0; printf("enter a positive integer: "); scanf("%d", &n); n1=n; while(n1!=0) rem=n1%10; num+=rem*rem*rem; n1/=10; if(num==n) printf("%d is an Armstrong number.",n); else printf("%d is not an Armstrong number.",n);

8 7. Write a c program to check weather given number is palindrome or not? #include <stdio.h> int main() int n, reverse = 0, temp; printf("enter a number to check if it is a palindrome or not\n"); scanf("%d",&n); temp = n; while( temp!= 0 ) reverse = reverse * 10; reverse = reverse + temp%10; temp = temp/10; if ( n == reverse ) printf("%d is a palindrome number.\n", n); else printf("%d is not a palindrome number.\n", n); return 0;

9 8. Write a C program to demonstrate the difference between %, / operator? #include <stdio.h> int main() int dividend, divisor, quotient, remainder; printf("enter dividend: "); scanf("%d",&dividend); printf("enter divisor: "); scanf("%d",&divisor); quotient=dividend/divisor; /* Computes quotient */ remainder=dividend%divisor; /* Computes remainder */ printf("quotient = %d\n",quotient); printf("remainder = %d",remainder); return 0;

10 9. Write a C program to print following output #include<stdio.h> #include<conio.h> void main() int I,j; clrscr(); printf( the pattern is:\n ); for(i=1;i<5;i++) for(j=1;j<5;j++) printf( %d\t,j); printf( \n ); getch();

11 10. Write a C program to find sum of digits of a given integer? #include <stdio.h> int main() int n, t, sum = 0, remainder; printf("enter an integer\n"); scanf("%d", &n); t = n; while (t!= 0) remainder = t % 10; sum = sum + remainder; t = t / 10; printf("sum of digits of %d = %d\n", n, sum); return 0;

12 11. Write a C program to find factorial of a given number using recursion? #include<stdio.h> int factorial(int n); int main() int n; printf("enter an positive integer: "); scanf("%d",&n); printf("factorial of %d = %ld", n, factorial(n)); return 0; int factorial(int n) if(n!=1) return n*factorial(n-1);

13 12. Write a C program to find Fibonacci series using recursion? #include<stdio.h> void printfibonacci(int); int main() int k,n; long int i=0,j=1,f; printf("enter the range of the Fibonacci series: "); scanf("%d %d ",&n); printf("fibonacci Series: "); printf("%d ",0); printfibonacci(n); return 0; void printfibonacci(int n) long int first=0,second=1,sum; while(n>0) sum = first + second; first = second; second = sum; printf("%ld ",sum); n--;

14 13. Write a C program to read and write data onto the file? #include<stdio.h> struct Student int roll; char name[12]; int percent; s1 = 10, "SMJC", 80 ; int main() FILE *fp; struct Student s2; fp = fopen("ip.txt", "w"); fwrite(&s1, sizeof(s1), 1, fp); fclose(fp); fp = fopen("ip.txt", "r"); fread(&s2, sizeof(s2), 1, fp); fclose(fp); printf("\nroll : %d", s2.roll); printf("\nname : %s", s2.name); printf("\npercent : %d", s2.percent); return (0);

15 14. Write a C program to create and update an employee record using files? #include <stdio.h> #include <stdlib.h> #include <string.h> #define size 200 struct emp int id; char *name; *emp1, *emp3; void display(); void create(); void update(); FILE *fp, *fp1; int count = 0; void main(int argc, char **argv) int i, n, ch; printf("1] Create a Record\n"); printf("2] Display Records\n"); printf("3] Update Records\n"); printf("4] Exit"); while (1) printf("\nenter your choice : "); scanf("%d", &ch); switch (ch) case 1: fp = fopen(argv[1], "a"); create(); break; case 2: fp1 = fopen(argv[1],"rb"); display(); break; case 3:

16 case 4: fp1 = fopen(argv[1], "r+"); update(); break; exit(0); /* To create an employee record */ void create() int i; char *p; emp1 = (struct emp *)malloc(sizeof(struct emp)); emp1->name = (char *)malloc((size)*(sizeof(char))); printf("enter name of employee : "); scanf(" %[^\n]s", emp1->name); printf("enter emp id : "); scanf(" %d", &emp1->id); fwrite(&emp1->id, sizeof(emp1->id), 1, fp); fwrite(emp1->name, size, 1, fp); count++; // count to number of entries of records fclose(fp); /* Display the records in the file */ void display() emp3=(struct emp *)malloc(1*sizeof(struct emp)); emp3->name=(char *)malloc(size*sizeof(char)); int i = 1; if (fp1 == NULL) printf("\nfile not opened for reading"); while (i <= count) fread(&emp3->id, sizeof(emp3->id), 1, fp1); fread(emp3->name, size, 1, fp1);

17 printf("\n%d %s",emp3->id,emp3->name); i++; fclose(fp1); free(emp3->name); free(emp3); void update() int id, flag = 0, i = 1; char s[size]; if (fp1 == NULL) printf("file cant be opened"); return; printf("enter employee id to update : "); scanf("%d", &id); emp3 = (struct emp *)malloc(1*sizeof(struct emp)); emp3->name=(char *)malloc(size*sizeof(char)); while(i<=count) fread(&emp3->id, sizeof(emp3->id), 1, fp1); fread(emp3->name,size,1,fp1); if (id == emp3->id) printf("enter new name of emplyee to update : "); scanf(" %[^\n]s", s); fseek(fp1, -204L, SEEK_CUR); fwrite(&emp3->id, sizeof(emp3->id), 1, fp1); fwrite(s, size, 1, fp1); flag = 1; break; i++; if (flag!= 1)

18 printf("no employee record found"); flag = 0; fclose(fp1); free(emp3->name); /* to free allocated memory */ free(emp3);

19 15. Write a C program to calculate average of n numbers using arrays? #include <stdio.h> int main() int n, i; float num[100], sum=0.0, average; printf("enter the numbers of data: "); scanf("%d",&n); while (n>100 n<=0) printf("error! number should in range of (1 to 100).\n"); printf("enter the number again: "); scanf("%d",&n); for(i=0; i<n; ++i) printf("%d. Enter number: ",i+1); scanf("%f",&num[i]); sum+=num[i]; average=sum/n; printf("average = %.2f",average); return 0;

20 16. Write a c program for addition of two matrices? #include<stdio.h> void main() int a[3][3],b[3][3],c[3][3],i,j; printf("enter the First matrix->"); for(i=0;i<3;i++) for(j=0;j<3;j++) scanf("%d",&a[i][j]); printf("\nenter the Second matrix->"); for(i=0;i<3;i++) for(j=0;j<3;j++) scanf("%d",&b[i][j]); printf("\nthe First matrix is\n"); for(i=0;i<3;i++) printf("\n"); for(j=0;j<3;j++) printf("%d\t",a[i][j]); printf("\nthe Second matrix is\n"); for(i=0;i<3;i++) printf("\n"); for(j=0;j<3;j++) printf("%d\t",b[i][j]); for(i=0;i<3;i++) for(j=0;j<3;j++) c[i][j]=a[i][j]+b[i][j]; printf("\nthe Addition of two matrix is\n"); for(i=0;i<3;i++) printf("\n"); for(j=0;j<3;j++) printf("%d\t",c[i][j]);

21 17. Write a c Program for multiplication of two matrices? #include <stdio.h> int main() int m, n, p, q, c, d, k, sum = 0; int first[10][10], second[10][10], multiply[10][10]; printf("enter the number of rows and columns of first matrix\n"); scanf("%d%d", &m, &n); printf("enter the elements of first matrix\n"); for (c = 0; c < m; c++) for (d = 0; d < n; d++) scanf("%d", &first[c][d]); printf("enter the number of rows and columns of second matrix\n"); scanf("%d%d", &p, &q); if (n!= p) printf("matrices with entered orders can't be multiplied with each other.\n"); else printf("enter the elements of second matrix\n"); for (c = 0; c < p; c++) for (d = 0; d < q; d++) scanf("%d", &second[c][d]); for (c = 0; c < m; c++)

22 for (d = 0; d < q; d++) for (k = 0; k < p; k++) sum = sum + first[c][k]*second[k][d]; multiply[c][d] = sum; sum = 0; printf("product of entered matrices:-\n"); for (c = 0; c < m; c++) for (d = 0; d < q; d++) printf("%d\t", multiply[c][d]); printf("\n"); return 0;

23 18. Write a C program for sorting an array? #include <stdio.h> void main() int i, j, a, n, number[30]; printf("enter the value of N \n"); scanf("%d", &n); printf("enter the numbers \n"); for (i = 0; i < n; ++i) scanf("%d", &number[i]); for (i = 0; i < n; ++i) for (j = i + 1; j < n; ++j) if (number[i] > number[j]) a = number[i]; number[i] = number[j]; number[j] = a; printf("the numbers arranged in ascending order are given below \n"); for (i = 0; i < n; ++i) printf("%d\n", number[i]);

24 19. Write a c program to find row sum and column sum of a matrix? #include <stdio.h> void main () static int array[10][10]; int i, j, m, n, sum = 0; printf("enter the order of the matrix\n"); scanf("%d %d", &m, &n); printf("enter the co-efficients of the matrix\n"); for (i = 0; i < m; ++i) for (j = 0; j < n; ++j) scanf("%d", &array[i][j]); for (i = 0; i < m; ++i) for (j = 0; j < n; ++j) sum = sum + array[i][j] ; printf("sum of the %d row is = %d\n", i, sum); sum = 0; sum = 0; for (j = 0; j < n; ++j) for (i = 0; i < m; ++i) sum = sum + array[i][j]; printf("sum of the %d column is = %d\n", j, sum); sum = 0;

25 20. Write a C program to sort strings using pointers? #include<stdio.h> #include<conio.h> #include<string.h> void main() char *x[20]; int i,n=0; void reorder(int n,char *x[]); printf("enter no. of String : "); scanf("%d",&n); printf("\n"); for(i=0;i<n;i++) printf("enter the Strings %d : ",i+1); x[i]=(char *)malloc(20*sizeof(char)); scanf("%s",x[i]); reorder(n,x); printf("\nreorder list is : \n"); for(i=0;i<n;i++) printf("%d %s\n",i+1,x[i]); void reorder(int n,char *x[]) int i,j; char t[20]; for(i=0;i<n-1;i++) for(j=i+1;j<n;j++) if(strcmp(x[i],x[j])>0) strcpy(t,x[j]); strcpy(x[j],x[i]); strcpy(x[i],t);

26 21. Write a c program for calculating number of words, characters in a given string? #include<stdio.h> #include<conio.h> int main() int count_words=0,i; int count_char=0; char str[20]; printf("enter string : "); gets(str); for(i=0; str[i]!=null; i++) count_char++; if(str[i]==' ') count_words++; printf("\nnumber of characters in string : %d",count_char); printf("\nnumber of words in string : % d",count_words+1); getch(); return 0;

27 22. Write a c program to demonstrate weather given string is palindrome or not? #include <stdio.h> #include <string.h> int main() char a[100], b[100]; printf("enter the string to check if it is a palindrome\n"); gets(a); strcpy(b,a); strrev(b); if (strcmp(a,b) == 0) printf("entered string is a palindrome.\n"); else printf("entered string is not a palindrome.\n"); return 0;

28 23. Write a c program to find number of words and vowels in a given string? #include<stdio.h> #include<stdlib.h> #include<ctype.h> #include<conio.h> #define low 1 #define high 0 void main() int nob, now, nod, nov, nos, pos = high; char *str; nob = now = nod = nov = nos = 0; clrscr(); printf("enter any string : "); gets(str); while (*str!= '\0') if (*str == ' ') // counting number of blank spaces. pos = high; ++nob; else if (pos == high) // counting number of words. pos = low; ++now; if (isdigit(*str)) /* counting number of digits. */ ++nod; if (isalpha(*str)) /* counting number of vowels */ switch (*str) case 'a': case 'e': case 'i': case 'o': case 'u': case 'A': case 'E': case 'I':

29 case 'O': case 'U': ++nov; break; /* counting number of special characters */ if (!isdigit(*str) &&!isalpha(*str)) ++nos; str++; printf("\nnumber of words %d", now); printf("\nnumber of spaces %d", nob); printf("\nnumber of vowels %d", nov); printf("\nnumber of digits %d", nod); printf("\nnumber of special characters %d", nos); getch();

30 24. Write a C program to demonstrate the self-referential structure? #include<stdio.h> #include<conio.h> #include<string.h> void main() struct student int rno; char name[10]; struct student *next; ; struct student s1; struct student s2; struct student s3; struct student *p; clrscr(); s1.rno=1; strcpy(s1.name,"aaa"); s1.next=&s2; s2.rno=2; strcpy(s2.name,"bbb"); s2.next=&s3; s3.rno=3; strcpy(s3.name,"ccc"); s3.next=null; p=&s1; printf("roll numbers and names of students are:\n"); while(p!= NULL) printf("%d\t %s\n",p->rno,p->name); p=p->next; getch();

31 25. Write a C program to demonstrate array of structures? #include<stdio.h> #include<conio.h> void main() struct student int rno; char name[15]; ; struct student std[10]; int i,n; clrscr(); printf("enter number of recoreds you want to store\n"); scanf("%d",&n); for(i=1;i<=n;i++) printf("enter number and name:\n"); scanf("%d%s",&std[i].rno,&std[i].name); for(i=1;i<=n;i++) printf("\nrecord of student %d is:\n",i); printf("%d\t%s",std[i].rno,std[i].name); getch(); 26.

32 27. Write a C program to find area of circle using macros? #include <stdio.h> #define PI #define area(r) (PI*(r)*(r)) int main() int radius; float area; printf("enter the radius: "); scanf("%d",&radius); area=area(radius); printf("area=%.2f",area); return 0;

33 28. Write a c program to demonstrate union in structure? #include <string.h> #include <stdio.h> typedef union int units; float kgs; amount ; typedef struct char selling[15]; float unitprice; int unittype; amount howmuch; product; int main() product dieselmotorbike; product apples; product * myebaystore[2]; int nitems = 2; int i; strcpy(dieselmotorbike.selling,"a Diesel Motor Cycle"); dieselmotorbike.unitprice = ; dieselmotorbike.unittype = 1; dieselmotorbike.howmuch.units = 4; strcpy(apples.selling,"granny dubois"); apples.unitprice = 0.78; apples.unittype = 2; apples.howmuch.kgs = 0.5; myebaystore[0] = &dieselmotorbike; myebaystore[1] = &apples;

34 for (i=0; i<nitems; i++) printf("\n%s\n",myebaystore[i]->selling); switch (myebaystore[i]->unittype) case 1: printf("we have %d units for sale\n", myebaystore[i]->howmuch.units); break; case 2: printf("we have %f kgs for sale\n", myebaystore[i]->howmuch.kgs); break;

PROGRAMMING IN C LAB MANUAL FOR DIPLOMA IN ECE/EEE

PROGRAMMING IN C LAB MANUAL FOR DIPLOMA IN ECE/EEE 1. Write a C program to perform addition, subtraction, multiplication and division of two numbers. # include # include int a, b,sum,