pasteC

#include <stdio.h>
#include <string.h>

int main(){
    // declare two strings large enough for most names
    char name[200], official[200];

    // declare an iterator variable and a variable for the number of parts of the name
    int i, parts;

    // read the name from the screen
    fgets(name, sizeof name, stdin);

    // set the number of parts to 0
    parts = 0;

    // iterate through the string, until we reach the end
    for(i = 0;i < 200 && name[i] != '\0';i++){

        // if the current char is a space, put a '\0' for the "end" of the string and increment the number of parts
        if(name[i] == ' '){
            name[i] = '\0';
            parts++;
        }
    }

    // set the current char to an end of line char
    name[i] = EOF;

    // iterate to the start of the last name
    while(i > 0 && name[i] != '\0') i--;

    // add the lastName to the official string and add ", "
    strcpy(official, name + i + 1);
    strcat(official, "\b, ");

    // reset i to 0
    i = 0;

    // while there are more than 0 parts to be printed, decrement parts
    while(--parts > 0){

        // iterate to the start of the next part of the name
        while(name[i++] != '\0');

        // add the part of the name and a space
        strcat(official, name + i);
        strcat(official, " ");
    }

    // add the first char of the first name
    name[1] = '\0';
    strcat(official, name);

    // show the result on the screen
    printf("%s.\n", official);
}