Convert String to Integer

Code

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

int custom_atoi(const char *str) {
    // Your logic here
    int x = 0, sgn = 1;
    switch(*str){
        case('-'):
            sgn = -1;
        case('+'):
            str++;
    }
    for(;*str != '\0';str++){
        if(*str < '0' || *str > '9')
            break;
        x = x * 10 + (int)(*str - '0');
    }
    x *= sgn;
    return x;
}

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