Remove all alphabets from an alphanumeric string

Posted on Apr 22, 2020

C program to remove all alphabets from an alphanumeric string.

Program

#include<stdio.h>
#include<conio.h>
#include<string.h>
#include<stdlib.h>
#define MAX 50

void main()
{
	char str[MAX];
    int i, j, len, pos;

    printf("Enter the string\t:");
    gets(str);

    len = strlen(str);

    for(i=0;i<len;i++)
    {
        if((str[i]>='a' && str[i]<='z') || (str[i]>='A' && str[i]<='Z'))
        {
            pos = i+1;
            for(j=pos-1;j<len;j++)
            {
                str[j] = str[j+1];
            }
            len = len-1;
            i--;
        }
    }

    str[len] = '\0';

    printf("\nModified string\t:%s",str);

    getch();
}

Output

Enter the string        :w3lc0m3 t0 c0ur53crux.c0m

Modified string :303 0 053.0