Convert a String to Float

Code

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

float custom_atof(const char *str) {
    // Your logic here
    int i=0, sign=1, divisor = 1;
    float int_result=0.0f;
    float float_result = 0.0f;
    float result=0.0f;

    if(str[i] == '-' || str[i] == '+'){
        if(str[i] == '-') sign = -1;
        i++;
    }

    while(str[i] != '\0'){

        if(str[i] == '.'){

            i++;

            while(str[i] != '\0'){
                float_result = float_result * 10 + (str[i] - '0');
                i++;
                divisor *= 10;
            }    

            break;
        }

        int_result = int_result * 10 + (str[i] - '0');
        i++;
    }

    return sign * (int_result + (float_result / divisor));
}

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