Convert a String to Float

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

float custom_atof(const char *str) {
    // Your logic here
    float sign = 1;
    int sw = 0;
    float output = 0;
    if(*str == '-'){
        str++;
        sign = -1;
    }
    if(*str == '+'){
        str++;
    }
    while(*str != '\0'){
        if(*str == '.'){
            sw = 1;
            str++;
            continue;
        }
        if(sw == 0){
            output = output * 10 + (*str - '0');
        }else{
            output += ((*str - '0') / pow(10,sw));
            sw++;
        }
        str++;
    }
    return output * 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;
}