(SPA) solution of programs

Program No. 16: WAP to accept 'n' integers from user into an array and display the count of even and odd numbers of these?
Ans:
#include
#include
void main()
{
    int n,i,a[100],even=0;
    clrscr();
         printf("Enter the number of elements:");
    scanf("%d",&n);
    for(i=0;i<=n-1;i++)
    {
        printf("Enter a value:");
        scanf("%d",&a[i]);
    }
    for(i=0;i<=n-1;i++)
    {
        if (a[i]%2==0)
        even++;
    }
    printf("The count of even numbers is %d and that of odd numbers is %d",even,(n-even));
    getch();
}

Program No. 17: Write a program to find an element in an array and display the index of the element using a function. OR Write a program to implement sequential search algorithm.

#include
#include
void main()
{
    int n,i,a[100],x,index;
    int search (int a[], int n, int x);
    clrscr();
         printf("Enter the number of elements:");
    scanf("%d",&n);
    for(i=0;i<=n-1;i++)
    {
        printf("Enter a value:");
        scanf("%d",&a[i]);
    }
    printf("Enter the element to be searched:");
    scanf("%d",&x);
    index=search(a,n,x);
    if(index==n)
    printf("Not Found");
    else
    printf("The element %d is found in the index %d",x,index);
    getch();
}
int search (int a[], int n, int x)
{
    int i;
    for(i=0;i<=n-1;i++)
    {
        if(x==a[i])
        break;
    }
    return i;
}

Program 18:Write a program to sort numbers in ascending order. R Write a program to implement bubble sorting algorithm for sorting numbers in ascending order.
#include
#include
void main()
{
    int n,i,a[100],x,index;
    void ascend (int a[], int n);
    clrscr();
         printf("Enter the number of elements:");
    scanf("%d",&n);
    for(i=0;i<=n-1;i++)
    {
        printf("Enter a value:");
        scanf("%d",&a[i]);
    }
    ascend(a,n);
    getch();
}
void ascend (int a[], int n)
{
    int i,j,temp;
    for(i=0;i<=n-2;i++)
    {
        for(j=0;j<=n-2;j++)
        {
            if(a[j]>a[j+1])
            {
                temp=a[j];
                a[j]=a[j+1];
                a[j+1]=temp;
            }
        }
    }
    printf("After sorting\n");
    for(i=0;i<=n-1;i++)
    {
        printf("%d\n",a[i]);
    }
} 

Program 19:Write a program to add two matrices of size m x n.

#include
#include
void main()
{
    int m,n,i,j,a[10][10],b[10][10],c[10][10];
    clrscr();
         printf("Enter the number of rows and columns:");
    scanf("%d %d",&m,&n);
    printf("Enter the elements of Matrix 1\n");
    for(i=0;i<=m-1;i++)
    {
        for(j=0;j<=n-1;j++)
        {
            printf("Enter a value:");
            scanf("%d",&a[i][j]);
        }
    }
    printf("Enter the elements of Matrix 2\n");
    for(i=0;i<=m-1;i++)
    {
        for(j=0;j<=n-1;j++)
        {
            printf("Enter a value:");
            scanf("%d",&b[i][j]);
        }
    }
    for(i=0;i<=m-1;i++)
    {
        for(j=0;j<=n-1;j++)
        {
            c[i][j]=a[i][j]+b[i][j];
        }
    }
    printf("The sum of two matrices is:\n");
    for(i=0;i<=m-1;i++)
    {
        for(j=0;j<=n-1;j++)
        {
            printf("%d\t",c[i][j]);
        }
        printf("\n");
    }
    getch();
}

Program 20:WAP to perform following string operation without using string function:
a) Copying a string and display it.
b) concatenate two string and display it.
c)reverse a string
d) check whether given string is palindrome or not.

a)   #include
#include

void main()
{
char str1[10],str2[10];
int i,j;
printf("\nEnter the string");
gets(str1);

for(i=0;str1[i]!='\0';i++)
{
str2[i]=str1[i];
}
str2[i]='\0';

printf("\n copied String=%s",str2);

getch();
}

b) 
#include

void main()
{
char str1[20],str2[10];
int i,l,j=0;

printf("\nEnter First string");
gets(str1);
printf("\nEnter Second string");
gets(str2);
l=strlen(str1);
for(i=l;str2[j]!='\0';j++,i++)
{
str1[i]=str2[j];
}
str1[i]='\0';

printf("\nString After Concatenation=%s",str1);
getch();
} 
c)
 #include
#include
void main()
{
    int n=0,i;
    char a[100],temp;
    clrscr();
    printf("Enter a string:");
    gets(a);
    while(a[n]!='\0')
    {
        n++;
    }
    for(i=0;i<=(n-1)/2;i++)
    {
        temp=a[n-i-1];
        a[n-i-1]=a[i];
        a[i]=temp;
    }
    printf("The reverse of this string is: %s",a);
    getch();
}
d)
 #include
#include
void main()
{
    int n=0,i;
         char a[100],rev[100];
    clrscr();
    printf("Enter a string:");
    gets(a);
    while(a[n]!='\0')
    {
        n++;
    }
    for(i=0;i<=(n-1);i++)
    {
        rev[n-i-1]=a[i];
    }
    for(i=0;i<=n-1;i++)
    {
        if(a[i]!=rev[i])
        break;
    }
    if(i==n)
    printf("The string is palindrome.");
    else
    printf("The string is not palindrome.");
    getch();
}
Program 21:

Write a program to find the sum of each row andcolumn elements of a 2 dimensional MxN array
 #include
#include
void main()
{
int m,n,i,j,a[10][10],sum=0;
clrscr();
printf("Enter the number of rows / columns:");
scanf("%d",&m);
n=m;
for(i=0;i<=m-1;i++)
{
for(j=0;j<=n-1;j++)
{
printf("Enter a value:");
scanf("%d",&a[i][j]);
}
}
for(i=0;i<=m-1;i++)
{
sum=0;
for(j=0;j<=n-1;j++)
{
sum+=a[i][j];
}
printf("\nsum of row%d=%d",i+1,sum);
}
for(i=0;i<=m-1;i++)
{
sum=0;
for(j=0;j<=n-1;j++)
{
sum+=a[j][i];
}
printf("\nsum of col%d=%d",i+1,sum);
}

getch();
}

Program 22:Write a program to swap two numbers using a function. Pss the values to be swapped to this function using call-by-value and call-by-reference method.

call by value
#include
#include
void main()
{
    int a,b;
    void swap (int a, int b);
    clrscr();
    printf("Enter two numbers:");
    scanf("%d %d",&a,&b);
    printf("The values of a and b in the main function before calling the swap function are %d and %d\n",a,b);
    swap(a,b);
    printf("The values of a and b in main function after calling the swap function are %d and %d\n",a,b);
    getch();
}
void swap (int a, int b)
{
    int temp;
    temp=a;
    a=b;
    b=temp;
    printf("The values of a and b in the swap function after swapping are %d and %d\n",a,b);
}
call-by-reference
#include
#include
void main()
{
    int a,b;
    void swap (int *p1, int *p2);
    clrscr();
    printf("Enter two numbers:");
    scanf("%d %d",&a,&b);
    printf("The values of a and b in the main function before calling the swap function are %d and %d\n",a,b);
    swap(&a,&b);
    printf("The values of a and b in main function after calling the swap function are %d and %d\n",a,b);
    getch();
}
void swap (int *p1, int *p2)
{
    int temp;
    temp=*p1;
    *p1=*p2;
    *p2=temp;
    printf("The values of a and b in the swap function after swapping are %d and %d\n",*p1,*p2);
}
 
program 23: Define structure within structure consisting of following elements:
i. Employee Code
ii. Employee Name
iii. Employee Salary and
iv. Employee Date_of_joining
Write a C program to read at least 10 records and display them.
struct emp
{
int empcode,esal;
char ename[10],doj[15];
 };
main()
{
struct emp e[10];
int n,i;
clrscr();
printf("\n enter the records(empcode,name,doj,sal):");
for(i=0;i<10 br="" i="">scanf("%d%s%s%d",&e[i].empcode,e[i].ename,doj,&e[i].esal);
printf("\n entered records are");
for(i=0;i<10 br="" i="">printf("\n %d\n %s \n %s\n %d",e[i].empcode,e[i].ename,e[i].esal);
getch();
}

program 24: Write a program to accept a set of 10 numbers and print the numbers using pointers. Find average of these integers.

#include
#include
void main()
{
int i,a[]={10,20,30,4,5,6,7,8,9,20},sum=0;
float avg;
clrscr();
printf("\nElement Using Pointer\n");
for(i=0;i<=9;i++)
{
printf("%d\t",*(a+i));
sum+=*(a+i);
}
avg=sum/2.0;
printf("\nAvg=%f",avg);
getch();
}