Convert a String to Float

Code

#include <stdio.h>
#include <stdint.h>

float custom_atof(const char *str) {
    // Your logic here
    float integer = 0;
    float decimal = 0;
    int scalar = 1;
    int sign = 1;
    int decimal_found = 0;

    if (*str == '-'){
        sign = -1;
        str++;
    } else if (*str == '+') {
        str++;
    }

    while (*str != '\0') {
        if ((*str < '0' || *str > '9') && (*str != '.')) {
            break;
        }
        if (!decimal_found) {
            if (*str == '.') {
                decimal_found = 1;
                str++;
                continue;
            }
            integer = integer * 10 + (*str - '0');
        } else {
            decimal = decimal * 10 + (*str - '0');
            scalar = scalar * 10;
        }
        str++;
    }

    decimal = decimal/scalar;
    return (integer + decimal) * sign;

}

int main() {
    char str[101];
    fgets(str, sizeof(str), stdin);

    // Remove newline
    uint8_t i = 0;
    while (str[i]) {
        if (str[i] == '\n') {
            str[i] = '\0';
            break;
        }
        i++;
    }

    float value = custom_atof(str);
    printf("%.2f", value);
    return 0;
}

Solving Approach