Question

C++ code Please:

1. Write a function to find the first occurrence of a given letter in a string, return the index. If not found, return -1. (2’)

Input example: str = "Hello World!" find(str, 'e')	Input example: str = "a random string" find(str, '3')
Output example: 1	Output example: -1

Answer 1

#include <iostream>

using namespace std;

int find(string s, char c)

{

// looping through each character

for(int i=0; i<s.length(); i++)

if(s[i] == c) // if it is same

return i; // returning the index

return -1; // otherwise comes here to return -1

}

int main() {

// sample output

cout << find("Hello World!", 'e') << endl;

cout << find("a random string", '3') << endl;

}

/*OUTPUT

1

-1

*/

// Please up vote or comment for doubts. Happy Learning!