98. Convert String to Integer

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

int custom_atoi(const char *str) {
    // Your logic here
    int val =0;
    const char *ptr = str;
    if ((*str == '-') |(*str == '+') ) ptr++;
    while ((*ptr >='0') && (*ptr <='9')){
        val = (val*10) + (*ptr - '0');
        ptr++;
    }
    if (*str == '-') val = -val;
    return val;
}

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;
}