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Remove Trailing Zeros from string in C++
IN this program we will see how to remove the trailing zeros from a string in C++. Sometimes some string may contain trailing zeros like "00023054". After executing this program, it will return "23054" only. The initial zeros are removed.
Input: A string with trailing zeros “000023500124” Output: “23500124”
Algorithm
Step 1: Get the string Step 2: Count number of trailing zeros n Step 3: Remove n characters from the beginning Step 4: return remaining string.
Example Code
#include<iostream>
using namespace std;
main() {
string my_str = "000023500124";
int num = 0;
cout << "Number with Trailing Zeros :" << my_str << endl;
//count number of trailing zeros in the string
while(my_str[num] == '0') {
num++;
}
my_str.erase(0, num); //erase characters from 0 to i index
cout << "Number without Trailing Zeros :" << my_str;
}Output
Number with Trailing Zeros :000023500124 Number without Trailing Zeros :23500124
Updated on: 30-Jul-2019
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