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C++ Program to Find Second Smallest Element in an Array
This article provides a program in C++ that find and prints the second smallest element from a given array. The first program is based on 10 array elements. Whereas the second program is based on n array elements.
Find Second Smallest Element using for Loop
The question is, write a C++ program that receives 10 array elements from user to find and print the second smallest element. Here is its answer:
#include<iostream> using namespace std; int main() { int i, num[10], small, ssmall; cout<<"Enter any 10 elements for the array: "; for(i=0; i<10; i++) cin>>num[i]; small = num[0]; for(i=0; i<10; i++) { if(small>num[i]) small = num[i]; } ssmall = num[0]; for(i=0; i<10; i++) { if(ssmall>num[i]) { if(num[i]!=small) ssmall = num[i]; } } cout<<"\nSecond smallest element = "<<ssmall; cout<<endl; return 0; }
The snapshot given below shows the initial output produced by above C++ program on finding the second smallest element from an array:
Now supply the input say 10, 9, 1, 2, 8, 7, 3, 4, 5, 6 as 10 array elements and press ENTER
key to find and print
the second smallest from all given 10 elements for the array like shown in the snapshot given below:
Allow User to Define the Size for Array
Since previous program is created with a limitation of only using 10 array elements, I've modified and created another program as given below, that find and prints the second smallest element from an array of n elements. The value of n and all n elements must be entered by user at run-time:
#include<iostream> using namespace std; int main() { int tot, i, num[100], s, ss; cout<<"Enter the Size for Array (max.100): "; cin>>tot; cout<<"Enter any "<<tot<<" elements for the array: "; for(i=0; i<tot; i++) cin>>num[i]; s = num[0]; for(i=0; i<tot; i++) { if(s>num[i]) s = num[i]; } ss = num[0]; for(i=0; i<tot; i++) { if(ss>num[i]) { if(num[i]!=s) ss = num[i]; } } cout<<"\nSecond smallest element = "<<ss; cout<<endl; return 0; }
Here is its sample run with user input 6 as size and 1, 2, 3, 4, 5, 0 as six elements:
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