Convert String to Integer

Code

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

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

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

Solving Approach