Convert String to Integer

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

int custom_atoi(const char *str) {
    int current_number = 0;
    bool isMinus = false;
    while(true){
        if(*str == '+');
        else if(*str == '-')
            isMinus = true;
        else if(*str >= '0' && *str <= '9')
            current_number = current_number * 10 + (*str - '0');
        else
            return (isMinus ? current_number*-1 : current_number);
        str++;
    }
    return 0;
}

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;
}