Convert String to Integer

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

int custom_atoi(const char *str) {
    // Your logic here
    int8_t sign =1;
    int value =0;
    if(*str == '-')
    {
        sign *=-1;
    }
    while(*str !='\0')
    {
        if(*str == '-' || *str == '+')
        {
            str++;
        }
        
        if(*(str) >= '0' && *(str) <= '9')
        {
            value=value*10 + *str-'0';
            str++;
        }
        else
        {
            return value*sign;
        }
    }
    return value*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++;
    }

    printf("%d", custom_atoi(str));
    return 0;
}