Dada una string str , la tarea es convertir la string dada en el número sin usar ninguna función incorporada.
Ejemplos:
C++
// C++ program for the above approach
#include <iostream>
using namespace std;
// Function to convert string to
// integer without using functions
void convert(string s)
{
// Initialize a variable
int num = 0;
int n = s.length();
// Iterate till length of the string
for (int i = 0; i < n; i++)
// Subtract 48 from the current digit
num = num * 10 + (int(s[i]) - 48);
// Print the answer
cout << num;
}
// Driver Code
int main()
{
// Given string of number
char s[] = "123";
// Function Call
convert(s);
return 0;
}
C
// C program for the above approach
#include <stdio.h>
#include <string.h>
// Function to convert string to
// integer without using functions
void convert(char s[])
{
// Initialize a variable
int num = 0;
int n = strlen(s);
// Iterate till length of the string
for (int i = 0; i < n; i++)
// Subtract 48 from the current digit
num = num * 10 + (s[i] - 48);
// Print the answer
printf("%d", num);
}
// Driver Code
int main()
{
// Given string of number
char s[] = "123";
// Function Call
convert(s);
return 0;
}
Java
// Java program for the above approach
class GFG{
// Function to convert string to
// integer without using functions
public static void convert(String s)
{
// Initialize a variable
int num = 0;
int n = s.length();
// Iterate till length of the string
for(int i = 0; i < n; i++)
// Subtract 48 from the current digit
num = num * 10 + ((int)s.charAt(i) - 48);
// Print the answer
System.out.print(num);
}
// Driver code
public static void main(String[] args)
{
// Given string of number
String s = "123";
// Function Call
convert(s);
}
}
// This code is contributed by divyeshrabadiya07
Python3
# Python3 program for the above approach # Function to convert string to # integer without using functions def convert(s): # Initialize a variable num = 0 n = len(s) # Iterate till length of the string for i in s: # Subtract 48 from the current digit num = num * 10 + (ord(i) - 48) # Print the answer print(num) # Driver code if __name__ == '__main__': # Given string of number s = "123" # Function Call convert(s) # This code is contributed by Shivam Singh
C#
// C# program for the above approach
using System;
class GFG{
// Function to convert string to
// integer without using functions
public static void convert(string s)
{
// Initialize a variable
int num = 0;
int n = s.Length;
// Iterate till length of the string
for(int i = 0; i < n; i++)
// Subtract 48 from the current digit
num = num * 10 + ((int)s[i] - 48);
// Print the answer
Console.Write(num);
}
// Driver code
public static void Main(string[] args)
{
// Given string of number
string s = "123";
// Function call
convert(s);
}
}
// This code is contributed by rock_cool
Publicación traducida automáticamente
Artículo escrito por akash_salvi y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA