Calculate number of digits of a decimal number in c

Question

how am I supposed to find the number of digits of decimal numbers in c? ex. find how many digits are in 123.4567?!

Answer 1

how am I supposed to find the number of digits of decimal numbers in c? ex. find how many digits are in 123.4567?

Start by converting it to a string.

#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main() {
    char input[] = "123.456";

    int i, d = 0, count = 0, len = strlen(input);
    for (i = 0; i < len; i++) {
    if (input[i] == '.') {
        if (++d == 1) {
        printf("int count %d\n", count);
        if (i == 0) {
            break;
        }
        continue;
        }
        // 2 or more decimal points.
        break;
    }
    if (isdigit(input[i])) {
        count++;
        continue;
    }
    // Found a non-digit non-decimal point.
    if (i == 0) {
        printf("int count %d\n", count);
    }
    break;
    }
    printf("all count %d\n", count);
}