1. Write a C program to pass an array containing age of person to a function.
This function should find average age and display the average age in main function.
#include <stdio.h>
float average(float a[]);
int main(){
float avg, c[]={23.4, 55, 22.6, 3, 40.5, 18};
avg=average(c); /* Only name of array is passed as argument. */
printf("Average age=%.2f",avg);
return 0; }
float average(float a[]){
int i;
float avg, sum=0.0;
for(i=0;i<6;++i){
sum+=a[i];
avg =(sum/6);
return avg;
Output
Average age=27.08

2. Example to pass two-dimensional arrays to function
#include
void Function(int c[2][2]);
int main() {
int c[2][2],i,j;
printf("Enter 4 numbers:\n");
for(i=0;i<2;++i)
for(j=0;j<2;++j)
scanf("%d",&c[i][j]); }
Function(c); /* passing multi-dimensional array to function */
return 0;
void Function(int c[2][2])
/* Instead to above line, void Function(int c[][2]){ is also valid */
int i,j;
printf("Displaying:\n");
printf("%d\n",c[i][j]);

3. Output
Enter 4 numbers: 2 3 4 5
Displaying:

4. Write a C program to find sum of two matrix of order 2
Write a C program to find sum of two matrix of order 2*2 using multidimensional arrays where, elements of matrix are entered by user.
#include <stdio.h> int main() { float a[2][2], b[2][2], c[2][2]; int i,j; printf("Enter the elements of 1st matrix\n"); /* Reading two dimensional Array with the help of two for loop. If there was an array of 'n' dimension, 'n' numbers of loops are needed for inserting data to array.*/ for(i=0;i<2;++i) for(j=0;j<2;++j) printf("Enter a%d%d: ",i+1,j+1); scanf("%f",&a[i][j]); } printf("Enter the elements of 2nd matrix\n"); for(i=0;i<2;++i) for(j=0;j<2;++j)

5. printf("Enter b%d%d: ",i+1,j+1); scanf("%f",&b[i][j]); }{
printf("Enter b%d%d: ",i+1,j+1);
scanf("%f",&b[i][j]); }
for(i=0;i<2;++i) for(j=0;j<2;++j)
/* Writing the elements of multidimensional array using loop. */
c[i][j]=a[i][j]+b[i][j];
/* Sum of corresponding elements of two arrays. */
printf("\nSum Of Matrix:");
printf("%.1f\t",c[i][j]); if(j==1)
/* To display matrix sum in order. */
printf("\n");
return 0;

6. OUTPUT
Enter the elements of 1st matrix Enter a11: 2; Enter a12: 0.5; Enter a21: -1.1; Enter a22: 2; Enter the elements of 2nd matrix Enter b11: 0.2; Enter b12: 0; Enter b21: 0.23; Enter b22: 23; Sum Of Matrix:

7. SUBTRACTION OF TWO MATRICES
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 Subtraction of two matrix is\n"); for(i=0;i<3;i++){ printf("\n"); printf("%d\t",c[i][j]); return 0; }
#include<stdio.h> int 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->"); scanf("%d",&b[i][j]); printf("\nThe First matrix is\n"); for(i=0;i<3;i++){ printf("\n"); printf("%d\t",a[i][j]); }

8. #include<stdio.h> int fact(int); int main(){ int num,f;
Factorial program by recursion in c Factorial program in c using recursion C program to calculate factorial using recursion Recursive function for factorial in c
#include<stdio.h>
int fact(int);
int main(){
  int num,f;
printf("\nEnter a number: ");
  scanf("%d",&num);
  f=fact(num);
  printf("\nFactorial of %d is: %d",num,f);
  return 0; }
int fact(int n){
   if(n==1)
       return 1;
   else
       return(n*fact(n-1));  }

9. Matrix multiplication
#include<stdio.h>
int main(){
  int a[5][5],b[5][5],c[5][5],i,j,k,sum=0,m,n,o,p;
  printf("\nEnter the row and column of first matrix");
  scanf("%d %d",&m,&n);
  printf("\nEnter the row and column of second matrix");
  scanf("%d %d",&o,&p);
  if(n!=o){
      printf("Matrix mutiplication is not possible");
      printf("\nColumn of first matrix must be same as row of second matrix");
  }
  else{
      printf("\nEnter the First matrix->");
      for(i=0;i<m;i++)
      for(j=0;j<n;j++)
           scanf("%d",&a[i][j]);
      printf("\nEnter the Second matrix->");
      for(i=0;i<o;i++)
      for(j=0;j<p;j++)
           scanf("%d",&b[i][j]);
      printf("\nThe First matrix is\n");
      for(i=0;i<m;i++){
      printf("\n");
      for(j=0;j<n;j++){
           printf("%d\t",a[i][j]);
      }
      }

10. printf("\nThe Second matrix is\n");
      for(i=0;i<o;i++){
      printf("\n");
      for(j=0;j<p;j++){
           printf("%d\t",b[i][j]);
      }       
      }
      for(i=0;i<m;i++)
      for(j=0;j<p;j++)
           c[i][j]=0;
      for(i=0;i<m;i++){ //row of first matrix
      for(j=0;j<p;j++){  //column of second matrix
           sum=0;
           for(k=0;k<n;k++)
               sum=sum+a[i][k]*b[k][j];
           c[i][j]=sum;
      }
  }
  printf("\nThe multiplication of two matrix is\n");
  for(i=0;i<m;i++){
      printf("\n");
      for(j=0;j<p;j++){
           printf("%d\t",c[i][j]);
      }
  return 0; }

11. #include<stdio.h> int main(){ int a[10],i,n,m,c=0,l,u,mid;
Write a simple code for binary search in c programming language Write a c program to search an element in an array using binary search
#include<stdio.h>
int main(){
    int a[10],i,n,m,c=0,l,u,mid;
    printf("Enter the size of an array: ");
    scanf("%d",&n);
    printf("Enter the elements in ascending order: ");
    for(i=0;i<n;i++){
         scanf("%d",&a[i]);
    }
    printf("Enter the number to be search: ");
    scanf("%d",&m);
l=0,u=n-1;
    while(l<=u){
         mid=(l+u)/2;
         if(m==a[mid]){
             c=1;
             break;
         }
   

12. Enter the size of an array: 5
else if(m<a[mid]){
             u=mid-1;
         }
         else
             l=mid+1;
    }
    if(c==0)
         printf("The number is not found.");
    else
         printf("The number is found.");
    return 0; }
OUTPUT:
Enter the size of an array: 5
Enter the elements in ascending order:
Enter the number to be search: 11
The number is found.

13. Write a C program which will accept multiple strings the user and will sort them in ascending order.
#include<stdio.h> #include<string.h> #include<stdlib.h> int main() { char *str[5], *temp; int i, j, n; printf("\nHow many names do you want to have?"); scanf("%d", &n); for (i = 0; i < n; i++) { printf("\nEnter the name %d: ", i); flushall(); gets(str[i]); }

14. for (i = 0; i < n; i++) {
      for (j = 0; j < n - 1; j++) {
         if (strcmp(str[j], str[j + 1]) > 0) {
            strcpy(temp, str[j]);
            strcpy(str[j], str[j + 1]);
            strcpy(str[j + 1], temp);
         }
      }
   }
    flushall(); 
   printf("\nSorted List : ");
   for (i = 0; i < n; i++)
      puts(str[i]);
   return (0); }

15. OUTPUT How many names do you want to have? 4 Enter the name 0: pri
Enter the name 1: prt
Enter the name 2: prq
Enter the name 3: pra
Sorted List : pra pri prq prt