100. Convert a String to Float

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

float custom_atof(const char *str) {
    // Your logic here
    float result=0.0f,divisor=1.0f;
    
    int sign=1;
    int i=0;
    if(str[0]=='-')
    {
        sign=-1;
      i++;  
    }else if (str[0]=='+')
    {
        i++;
    }

    while(str[i]>='0'&& str[i]<='9')
    {
        result=result * 10.0f+(str[i]-'0');
        i++;
    }
    if(str[i]=='.')
    {
        i++;
        while(str[i]>='0'&& str[i]<='9')
        {   
            divisor*=10.0f;
            result+=(str[i]-'0')/divisor;
            i++;
        }
    }
    return result*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;
}