$ gcc wei.c
/tmp/cc37c0dL.o: In function `main':
wei.c:(.text+0x263): undefined reference to `spawnvp'
collect2: ld returned 1 exit status

spawnvp(P_WAIT, "sort", "sort /home/clarkb/000files/list/chinese.tmp -o /home/clarkb/000files/list/wei.lis");

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>

int spawnvp(const char* progname, const char* execStatement);


int main()
{
    //int ret = spawnvp(P_WAIT, "sort", "sort /home/clarkb/000files/list/chinese.tmp -o /home/clarkb/000files/list/wei.lis");

    int ret = spawnvp("/bin/sort", "/bin/sort /home/clarkb/000files/list/chinese.tmp -o /home/clarkb/000files/list/wei.lis");

    return (ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
}


int spawnvp(const char* progname, const char* execStatement)
{
    char* execStatementCopy = strdup(execStatement);
    char* ptrCopy = execStatementCopy;

    int   argc = 0;
    char* argv[20] = {NULL};

    char* arg = strtok(ptrCopy, " ");

    while (arg != NULL)
    {
        if (argc == 19)
        {
            /* only allow up to 19 args; number 20 must remain NULL */
            break;
        }

        argv[argc++] = arg;

        arg = strtok(NULL, " ");
    }

    free(execStatementCopy);

    pid_t pid = -1;

    if ((pid = fork()) == 0)
    {
        /* child */
        execv(progname, argv);

        printf("Failed to invoke execv(); error is %s (%d)\n", strerror(errno), errno);
    }
    else if (pid > 0)
    {
        /* parent */
        return 0;
    }

    return -1;
}

/**
 ** wei.c ---- program to study Chinese
 **            
 ** todo list: recycle over missed words
 **            quit any time 'q' is encountered in getch()
 **            
 **/

/* #include <process.h> */
/* #include <unistd.h> */
#include <stdio.h>
#include <string.h>
#include <time.h>

#define CMAX 75
#define P_WAIT 1
#define WMAX 500

int main()
{
char buff[CMAX];
char estring, chstring;
char *epointer, *cpointer;
char sflag;
char control, ctrlstr;
char qstring[7];
int i, len;
int iword=0;
int iflag=0;
int qflag=0;
int idummy=0;
int iran=333; 
FILE *infile, *tmpfile, *wrdfile;
char *args[] = {
  "sort",   /* supposedly ignores the first arg */
  "/home/clarkb/000files/list/chinese.tmp",
  "-o",
  "/home/clarkb/000files/list/wei.lis",
  0         /* last arg is NULL */
};

srand((int)time(NULL));
strcpy(qstring, "What is");

/*printf("Have you sorted the current version of \n");
printf("    /home/clarkb/000files/list/chinese.txt      and saved it as \n");
printf("    /home/clarkb/000files/list/wei.lis? ");
scanf("%s", &sflag);
if( sflag == 'y' || sflag == 'Y')
    idummy=1;
else{
    printf("Please do so and then rerun program! \n");
    return;
} */

infile = fopen("/home/clarkb/000files/list/chinese.lis","r");
if(infile == NULL) return;

tmpfile = fopen("/home/clarkb/000files/list/chinese.tmp","w");
/* tmpfile = fopen("/home/clarkb/000files/list/chinese.txt","w"); */

while(fgets(buff,299,infile) != NULL) {
    int len = strlen(buff);
    iword++;
    while(--len >= 0) {
        if(buff[len] == '\n') { buff[len] = '\0'; continue; }
	if(buff[len] == '\r') { buff[len] = '\0'; continue; }
        break;
    }

/* find English part of buffer*/
    epointer=buff;
    while(*epointer != '-') epointer++;
    epointer++;
    while(*epointer == ' ') epointer++;

/* find Chinese part of buffer */
    cpointer=strtok(buff, "-"); 

/* assign random #'s to each line and put in temporary output file */
    iran=rand(); 
    fprintf(tmpfile,"%d @ %s - %s\n", iran, cpointer, epointer);
}

fclose(infile);
fclose(tmpfile);

/* sort the tmpfile and make the randomized wrdfile */
//spawnvp(P_WAIT, "sort", args);
//spawnvp(P_WAIT, args);
spawnvp(P_WAIT, "sort", "sort /home/clarkb/000files/list/chinese.tmp -o /home/clarkb/000files/list/wei.lis");

printf("Do you want to be prompted with English [1] or Chinese [2] words? ");
scanf("%d", &iflag);
if(iflag != 1 && iflag != 2){
printf("Please enter 1 or 2: ");
scanf("%d", &iflag);
}
if(iflag != 1 && iflag != 2){
printf("THIS IS YOUR LAST CHANCE! ENTER 1 OR 2: ");
scanf("%d", &iflag);
}
if(iflag != 1 && iflag != 2) return;
/* iflag=1;  uncomment for debugging */

/* open and read word file */
wrdfile = fopen("/home/clarkb/000files/list/wei.lis","r"); 

while(fgets(buff,299,infile) != NULL) {
    int len = strlen(buff);
    while(--len >= 0) {
        if(buff[len] == '\n') { buff[len] = '\0'; continue; }
	if(buff[len] == '\r') { buff[len] = '\0'; continue; }
	break;
    }

/* find English part of buffer*/
    epointer=buff;
    while(*epointer != '-') epointer++; 
    epointer++;
    while(*epointer == ' ') epointer++;

/* find Chinese part of buffer */
    cpointer=strtok(buff, "-");
    while(*cpointer != '@') cpointer++;
    cpointer++;

/*    GrClearScreen(GrBlack()); 
    GrTextXY(0,0,qstring,GrWhite(),GrNOCOLOR); */

    if( iflag == 1 ){
        printf("%s -> ", epointer);
        control=ctrlquit(infile,wrdfile,qflag);  /* not passing qflag,
                                                    so now cannot quit
                                                    on first prompt;
                                                    probably not passing
                                                    filenames correctly
                                                    either */
        printf("%s \n", cpointer); 

        control=ctrlquit(infile,wrdfile,qflag);
    }
    else{
        printf("%s -> ", cpointer);
        control=ctrlquit(infile,wrdfile,qflag);  /* not passing qflag,
                                                    so now cannot quit
                                                    on first prompt;
                                                    probably not passing
                                                    filenames correctly
                                                    either */
        printf("%s \n", epointer); 

        control=ctrlquit(infile,wrdfile,qflag);
    }
}
/* function not passing flags, so comment out
if(qflag == 0)
    printf("You've exhausted the database. Now, get back to work!"); */
return;
}

/* int ctrlquit(FILE *file1, FILE *file2, int iquit) */
int ctrlquit(FILE *file1, FILE *file2, int iquit)
{
#include <stdio.h>  
#include <string.h>

/* int iquit=0; */
char ctrlstr;
/* FILE *file1, *file2; */

iquit=0;

/* ctrlstr=getch(); */
ctrlstr=getchar();

if(ctrlstr == 'q'){
    iquit=1;
    fclose(file1);
    fclose(file2);
    return;
}
}

1014397292 @ huang2  - yellow
1016230060 @ shang4 ban1  - to go to work
10193955 @ er2 zi  - son
1042731458 @ zo3     - left
1046695493 @ x:ue2 sheng1  - student

#!/bin/bash

# Check parameters, and output help if necessary.
if [ $# -lt 1 ] || [ $# -gt 2 ] || [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
    # Help is output to standard error.
    exec >&2

    echo ""
    echo "Usage: $0 [-h|--help]"
    echo "       $0 DICTIONARY-FILE [SIDE]"
    echo ""
    echo "DICTIONARY-FILE"
    echo "    Contains pair of words or sentences on each line,"
    echo "    separated by vertical bar, |."
    echo ""
    echo "SIDE"
    echo "    Optional argument, specifies whether the first [1]"
    echo "    or second [2] language is shown."
    echo "    Default is 1, i.e. first word/sentence on each line"
    echo "    in DICTIONARY-FILE is shown."
    echo ""

    exit 1
fi

# Check the SIDE parameter.
case "$2" in
    1|[Ff]*)        # 1 or first
        SIDE=1
        ;;
    2|[Ss]*|[Oo])   # 2 or second or other
        SIDE=2
        ;;
    "")             # Not specified; set default
        SIDE=1
        ;;
    *)  echo "$3: I don't understand which side you mean." >&2
        exit 1
        ;;
esac

# Load all the words from the first file.
Word1=()
Word2=()
Words=0
IFS='|'
while read -r w1 w2 w3 ; do
    [ "$w1" = "" ] && continue
    [ "$w2" = "" ] && continue
    Words=$[Words+1]
    if [ $SIDE -eq 1 ]; then
        Word1[Words]="$w1"
        Word2[Words]="$w2"
    else
        Word1[Words]="$w2"
        Word2[Words]="$w1"
    fi
done < <( sed -e 's@^[\t\n\v\f\r ]*@@; s@[\t\n\v\f\r ]*|[\t\n\v\f\r ]*@|@g; s@[\t\n\v\f\r ]*$@@;' "$1") || exit $?
if [ $Words -lt 1 ]; then
    echo "$1: No word or sentence pairs in file." >&2
    exit 1
fi

# Shuffle.
echo -n "Read $Words entries from '$1'. Shuffling.." >&2
for ((round=1; round<=13; round++)); do
    for ((i=1; i<=Words; i++)); do
        k=$[1 + RANDOM % Words]
        w1="${Word1[i]}"
        w2="${Word2[i]}"
        Word1[i]="${Word1[k]}"
        Word2[i]="${Word2[k]}"
        Word1[k]="$w1"
        Word2[k]="$w2"
    done
done
echo " and done." >&2

# Empty line is too easy to type, so let's make a . as the exit command.
echo "" >&2
echo "Press Ctrl+D or type only . to exit." >&2
echo "" >&2

correct=0
wrong=0
for ((i=1; i<=Words; i++)); do

    answer=""

    while [ "$answer" = "" ]; do
        printf '%d / %d: (%d out of %d correct thus far)\n\t  %s\n' $i $Words $correct $[correct+wrong] "${Word1[i]}"
        read -p $'\t> ' answer || answer="."
    done

    [ "$answer" = "." ] && break

    if [ "$answer" = "${Word2[i]}" ]; then
        correct=$[correct + 1]
        echo "Correct."
    else
        wrong=$[wrong + 1]
        echo "Incorrect. '${Word2[i]}'"
    fi
done

echo ""
echo "You answered $[i-1] of $Words questions."
echo "You got $correct out of $[correct+wrong] correct."
echo ""

huang2       | yellow
shang4 ban1  | to go to work
er2 zi       | son
zo3          | left
x:ue2 sheng1 | student

\e[0;30m    black
\e[0;31m    red
\e[0;32m    green
\e[0;33m    brown/yellow
\e[0;34m    blue
\e[0;35m    magenta
\e[0;36m    cyan
\e[0;37m    light gray
\e[1;30m    dark gray
\e[1;31m    light red
\e[1;32m    light green
\e[1;33m    yellow
\e[1;34m    light blue
\e[1;35m    light magenta
\e[1;36m    light cyan
\e[1;37m    white
\e[0m       to return to default (recommended at end of each line)