Convert String to Integer

Code

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

int custom_atoi(const char *str) {
    // Your logic 
    int res=0,sign=1;
    switch(*str){
        case '+':
            str++;
            break;
        case '-':
            sign=-1;
            str++;
    }
    while(*str >='0' && *str <='9'){
        uint8_t temp = (*str-'0');
        res= res*10+temp;
        str++;
    }
    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;
}

Solving Approach