Implement a Simple Shell Command Parser

Code

#include <stdio.h>
#include <ctype.h>

int extract_token(char *str, char *token) {
    int i;
    for (i=0; (str[i] != ' ') && (str[i] != '\0'); i++) {
        token[i] = str[i];
    }
    token[i] = '\0';
    return i;
}


void parse_shell_input(char *line) {
    // Your logic here
    char token[100][100];
    int i, j, count;
    for (i=0, j=0; (line[i] != '\0'); i++) {
        if ((line[i] != ' ')) {
            i += extract_token(&line[i], token[j]) - 1;
            j++;
        }
     }
     count= j; 
     //printf("%d\n", count);
     for (i=0; i < count; i++) {
        printf("%s\n", token[i]);
     }
}

int main() {
    char line[101];
    fgets(line, sizeof(line), stdin);

    parse_shell_input(line);
    return 0;
}

Solving Approach

Prepare an array to hold the tokens

scan for first non blank char in the line, and pass it to the parser who will take the non-blank chars into a token, and advance to the next blank