Convert a String to Float

Code

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

float custom_atof(const char *str) {
    // Your logic here
    int i=0;
    float div =10.0f;
    float fraction =0;
    int sym=1;
    float num=0;
    float num1=0;
    bool comma =0;

    while(str[i] != '\0')
    {
        if(str[i] == '-')
        sym=-1;
        else if(str[i] == '.')
        {
            comma=1;
        }
        else if( str[i] >= '0' && str[i] <= '9')
        {
            if(comma ==1)
            {
                 num1 = (str[i] -'0');
                 fraction += num1/div;
                 div *= 10.0f;
                
            }
            else
            num = num * 10 + (str[i] -'0');
        }
        

       i++;
    }
    
    //num1 = num1/(j*10.0);
    num = (num + fraction) * sym;
    return num;
}

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