atoi() in C++

atoi(): This function convert string to an integer. This function Parses the C-string str interpreting its content as an integral number, and returned it as a value of type int. The string may contain some other characters than digits after the digits, these characters are ignored.

Parameters: One parameter is required for this function.

str: A string that is to be converted into the int type.

Syntax:

atoi(str)

For Example:

atoi("12.45") = > It return 12.

Approach

C++

#include <bits/stdc++.h>
using namespace std;

int main()
{
    char str[] = "12.45";

    cout << atoi(str) << "\n";

    return 0;
}