C Programming Codes

// Program for traversing an array #include<stdio.h> int main() { int a[30],i,size; printf("Enter the size of the array:"); scanf("%d",&size); printf("Enter the array elements:\n"); for(i=0 ; i< size ;i++) { scanf("%d",&a[i]); } //Traversing array elements using for loop for(i=0 ;i<size ;i++) { printf("%d\t",a[i]); } return 0; }

What is Traversing of an array? The process of visiting each and every element of an array in a specific order is called Traversing an array. This can be done using a loop, such as a for loop or a while loop.

// 11.Program to find the second largest element of an array #include<stdio.h> int main() { int a[20],i,large1,large2,size; printf("Enter the size of the array:"); scanf("%d",&size); printf("Enter the elements of the array:\n"); for(i=0 ; i< size ; i++) { scanf("%d",&a[i]); } if(a[0]>a[1]){ large1=a[0]; large2=a[1]; } else{ large1=a[1]; large2=a[2]; } for(i=2 ; i<size ;i++) { if(a[i]>large1){ large2=large1; large1=a[i]; } else if(a[i] > large2 && a[i]<large1){ large2=a[i]; } } printf("The second largest element of the array= %d",large2); return 0; }

//10. Program to add two single dimensional arrays which have 5 elements in each. #include<stdio.h> int main() { int a[5]={1,5,7,3,9},b[5]={2,6,4,8,10},c[5],i; for(i=0;i<5;i++) { c[i]=a[i]+b[i]; } printf("Resultant array after adding the two array's:\n"); for(i=0 ;i<5 ;i++) { printf("%d\t",c[i]); } return 0; }

//9. Write a C Program to generate Fibonacci series using arrays #include<stdio.h> int main() { int fib[20],i,n; printf("Enter number of terms in the fibonacci series:"); scanf("%d",&n); if(n<=0) { printf("Invalid input entered ,Please enter a positive number"); return 1; } fib[0]=0; fib[1]=1; for(i=2 ; i<n ;i++) //loop to generate fibonacci series { fib[i]=fib[i-1]+fib[i-2]; } printf("Fibonacci series upto %d terms :\n",n); for(i=0 ; i<n ; i++) { printf("%d ",fib[i]); } return 0; }

//8. Program to read n integers into array and count number of odd and even #include<stdio.h> int main() { int a[50],i,odd=0,even=0,n; printf("Enter the value of n:"); scanf("%d",&n); printf("Enter the elements into the array:\n"); for(i=0 ; i< n ;i++ ) { scanf("%d",&a[i]); } for(i=0 ; i<n ;i++) { if(a[i]%2 == 0) even++; //even = even +1 else odd++; } printf("Number of even numbers entered:%d\n",even); printf("Number of odd numbers entered :%d",odd); return 0; }

// program to print the array elements in reverse order . #include<stdio.h> int main() { int a[]={2,5,4,8,7},n,i; n=sizeof(a)/sizeof(a[0]); printf("The elements of the array are:\n"); for(i=0 ; i<n ; i++) { printf("%d\t",a[i]); } printf("\nThe array elements in reverse are:\n"); for(i=n-1 ; i>=0 ; i--) { printf("%d\t",a[i]); } return 0; }

// 6.Program to find the smallest element in the array #include<stdio.h> int main() { int a[]={11,5,10,3,34},n,smallest,i; n=sizeof(a)/sizeof(a[0]); // n will have the length of the array ,here its 5 smallest = a[0]; // first we will assume that first element is smallest for(i=1; i<n ;i++) { if(a[i] < smallest) // checking wheather other elements is smaller than first element { smallest=a[i]; //if any element is smaller ,assigning that value to smallest } } printf("The smallest element in the array is %d",smallest); return 0; }

// 6.Program to find the smallest element in the array #include<stdio.h> int main() { int a[]={11,5,10,3,34},n,smallest,i; n=sizeof(a)/sizeof(a[0]); // n will have the length of the array ,here its 5 printf("%d",n); smallest = a[0]; // first we will assume that first element is smallest for(i=1; i<n ;i++) { if(a[i] < smallest) // checking wheather other elements is smaller than first element { smallest=a[i]; //if any element is smaller ,assigning that value to smallest } } printf("The smallest element in the array is %d",smallest); return 0; }

// 5.Program to find the largest element in the array #include<stdio.h> int main() { int a[]={12,10,52,3,34},n,large,i; n=sizeof(a)/sizeof(a[0]); // n will have the length of the array ,here its 5 large=a[0]; // first we will assume that first element is largest for(i=1; i<n ;i++) { if(a[i]>large) // checking wheather other elements is larger than first element { large=a[i]; //if any element is large assigning that value to large } } printf("The largest element in the array is %d",large); return 0; }

// 5.Program to find the largest element in the array #include<stdio.h> int main() { int a[10]={12,10,52,3,34},n,large,i; n=sizeof(a)/sizeof(a[0]); // n will have the length of the array ,here its 5 large=a[0]; // first we will assume that first element is largest for(i=1; i<n ;i++) { if(a[i]>large) // checking wheather other elements is larger than first element { large=a[i]; //if any element is large assigning that value to large } } printf("The largest element in the array is %d",large); return 0; }

// 4.Program to find product of n elements in the array #include<stdio.h> int main() { int a[20],n,i,product=1; printf("Enter number of elements in the array:"); scanf("%d",&n); printf("Enter %d elements into the array:\n",n); for(i=0; i< n ;i++) //loop to read array elements { scanf("%d",&a[i]); } for(i=0 ; i< n ; i++) //loop to compute product of array elements { product=product*a[i]; } printf("Product of the array elements : %d",product); return 0; }

//3. Program to find sum and average of n array elements #include<stdio.h> int main() { int a[20],sum=0,n,i; float avg; printf("Enter number of elements in the array:"); scanf("%d",&n); printf("Enter the elements into the array:"); for(i=0 ; i<n ;i++) // loop for reading elements into array { scanf("%d",&a[i]); } for(i=0 ; i<n ;i++) //loop for calculating sum of array elements { sum = sum + a[i]; } avg=(float)sum/n; printf("Sum of array elements:%d\n",sum); printf("Average of array elements:%f\n",avg); return 0; }

//2. Program to initialize an array using run time initialization and print the array elements. #include<stdio.h> int main() { int a[20],i,n; printf("Enter number of elements:"); scanf("%d",&n); printf("Enter the elements into the array:\n"); for(i=0 ; i<n ; i++) { scanf("%d",&a[i]); } printf("Elements of array are,\n"); for(i=0 ; i<n ;i++ ) { printf("Array element at index %d is %d\n",i,a[i]); } return 0; }

//1. Program to initialize an array using compile time initialization and print the array elements. #include<stdio.h> int main() { int a[5]={1,2,5,9,12},i; printf("Elements of array are,\n"); for(i=0 ; i<sizeof(a)/sizeof(a[0]) ;i++ ) { printf("Array element at index %d is %d\n",i,a[i]); } return 0; }