Simple program to take in a file in C

#include <stdio.h> #include <string.h> #include <stdlib.h> #define MAX_LINE_LEN 1024 #define MAX(a,b) (((a) > (b)) ? (a) : (b)) #define LINE_WIDTH 70 #define WS " \":-(){}[]<>/\\=+\t" int main(int argc, char *argv[]) { FILE *fp; char line[MAX_LINE_LEN],*s, **words, fmt[8], *p; size_t numWords = 0, maxWordLen = 0, i = 0, j = 0, len, wordsPerLine; if ((argc < 2) || ((fp = fopen(argv[1],"r")) == NULL)) { printf("\nusage : %s <filename>\n",argv[0]); return -1; } /* count words */ while (fgets(line, MAX_LINE_LEN, fp) != NULL) { for (s = strtok(line,WS); s != NULL; s = strtok(NULL,WS)) { ++numWords; } } /* store words, and find length of longest word */ fseek(fp, 0, SEEK_SET); words = calloc(sizeof(char *), numWords); while (fgets(line, MAX_LINE_LEN, fp) != NULL) { if ((p = strchr(line,'\n')) != NULL) *p = '\0'; if ((p = strchr(line,'\r')) != NULL) *p = '\0'; for (s = strtok(line,WS); s != NULL; s = strtok(NULL,WS)) { words[i] = calloc(sizeof(char), (len = strlen(s)) + 1); strcpy(words[i++], s); maxWordLen = MAX(maxWordLen, len); } } fclose(fp); /* display */ wordsPerLine = LINE_WIDTH / maxWordLen; sprintf(fmt, "%%-%ds ", maxWordLen); for (i = 0; i < numWords; i++) { printf(fmt, words[i]); if ((++j % wordsPerLine) == 0) puts(""); } puts(""); /* when done with words[][], free allocated memory */ return 0; }