98. Convert String to Integer

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

int custom_atoi(const char *str) {
    int sign=1;
    int res=0;
    uint8_t i=0;
    if(str[i]=='-'){
            sign=-1;
            i++;
        }
        else if(str[i]=='+'){
           i++;
        }
        
    while(str[i]>='0'&&str[i]<='9'){
           res=res*10+(str[i]-'0');
           i++;
        

    
    }
    return res*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;
}