Convert a String to Float

Code

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

float custom_atof(const char *str) {
    // Your logic here
    double integer = 0;
    double place = 0.1;
    float result = (float)malloc(sizeof(float));
    // float result =0;
    int sign =1;
    if (*str == '-') {
        sign = -1;
        str++;
    }
    else if (*str == '+') {
        sign = 1;
        str++;
    }

    while (*str >= '0' && *str <= '9') {
        integer = ((int)(*str - '0')) + (integer *10);
        str++;

    }

    if (*str == '.'){
        str++;
    }

     while (*str != '\0') {
        result +=  place * (int)(*str - '0');
        place *= 0.1;
        str++;
    }

    result += integer * sign;
    result *= sign;
    // printf("%f",result);
    return result ;
}

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