Question

How to remove all letters from an alphanumeric string in C

Answer 1

#include <stdio.h>
#include <string.h>

void RemoveAlphabets(char* string) {
	size_t length = 0;

	length = strlen(string);

	for (int i = 0; i < length; i++) {
		for (int j = 0; j < length; j++) {
			if ((string[j] >= 'a' && string[j] <= 'z') || (string[j] >= 'A' && string[j] <= 'Z')) {
				for (int k = j; k < length; k++) {
					string[k] = string[k + 1];
				}
				length--;
			}
		}
	}
}

int main(void)
{
    char string[] = "c 17 d 900 e 8542";

	RemoveAlphabets(string);

    puts(string);

    return 0;
}




/*
run:

 17  900  8542

*/

 

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