How to search a missing number in an array that contains integers from 1 to 100? in C++
C++
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#include <iostream>using namespace std;int main() { int a[100]; for (int i = 0; i < 100; i++) { a[i] = i + 1; //initialize the array with numbers from 1 to 100. } a[45] = 0; //make the number 45 missing. int sum = 0, sum1 = 0; for (int j = 0; j < 100; j++) { //calculate the sum of all numbers in the array. sum += a[j]; } for (int k = 1; k <= 100; k++) { //calculate the sum of all numbers from 1 to 100. sum1 += k; } cout << "The missing number is: " << sum1 - sum << endl ; //the difference between these two sums is the missing number. 🤖 Code Explanation
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