I wrote this piece of code, which has t test cases, and for every test cases it would input 3 digits. I want this program to then identify the minimum element among those three inputs, and then print the minimum element. What should I do?
int main()
{
int t;
cin>>t;
while(t--)
{
for(int i=0;i<3;i++)
{
int n;
cin>>n;
}
}
return 0;
}
Here's a example of finding the minimum of three digits, using a running minimum:
#include <iostream>
int main()
{
unsigned int test_case_quantity = 0U;
std::cin >> test_case_quantity;
while(test_case_quantity--)
{
char minimum;
std::cin >> minimum;
char digit;
std::cin >> digit;
if (digit < minimum) minimum = digit;
std::cin >> digit;
if (digit < minimum) minimum = digit;
std::cout << " minimum: " << minimum << "\n";
std::cin.ignore(100000, '\n'); // Synchronize to next line.
}
return 0;
}
For a more robust program, you can add validation that the character read is actually numeric.
char as opposed to an int? As you mentioned, doing so can have consequences, in particular when a user enters a non-numeric number. So why use a char if it complicates the solution?
char type is a numeric data type and the operator< can be applied to them.We can make use of an extra variable say small and when we are inputting the very first number, we can assign that first number to the small and in all other cases we can compare whether the current number is less than small, if yes then update small.
Finally outside the loop we can print the value of small and this will be our answer.
int main()
{
int t;
cin>>t;
while(t--)
{
int small;
for(int i=0;i<3;i++)
{
int n;
cin>>n;
if (i == 0)
small = n;
else {
if (n < small)
small = n;
}
}
cout<<"Smallest number is :" << small;
}
return 0;
}
input :
1
10 2 3
output :
Smallest number is :2
Flow : At first the value 10 will be assigned as small, then for the next element 2, we compare whether 2 is less than small which is 10 in that case, and reassign small to 2. Then this small is checked with 3, but 2 < 3, so small value remains unchanged.
I assume there will be only integer values as input.
char. You can still determine the minimum of the three.