Script started on Thu Jan 23 09:12:59 2003 [root@Fizzgig /root]# cd C [root@Fizzgig C]# cat lowercase.c /* lowercase.c */ /* Changes all uppercase characters given through standard input */ /* to lowercase */ /* */ /* Author: Zach Tomaszewki */ /* Date: 22 Jan 2003 */ #include int main (){ char nextChar = getchar(); while (nextChar != EOF){ if (nextChar > 64 && nextChar < 91){ //is an uppercase ASCII char nextChar += 32; } printf("%c", nextChar); nextChar = getchar(); } return 0; } [root@Fizzgig C]# gcc -g lowercase.c -o lowercase [root@Fizzgig C]# lowercase < se.txt secret de deux, secret de dieu, secret de trois, secret de tous. (french proverb)[root@Fizzgig C]# cat uppercase.c /* uppercase.c */ /* Changes all lowercase characters given through standard input */ /* to uppercase */ /* */ /* Author: Zach Tomaszewki */ /* Date: 23 Jan 2003 */ #include int main (){ char nextChar = getchar(); while (nextChar != EOF){ if (nextChar >= 97 && nextChar <= 122){ // is lowercase ASCII char nextChar -= 32; } printf("%c", nextChar); nextChar = getchar(); } return 0; } [root@Fizzgig C]# gcc -g uppercase.c -o uppercase [root@Fizzgig C]# uppercase < se.txt SECRET DE DEUX, SECRET DE DIEU, SECRET DE TROIS, SECRET DE TOUS. (FRENCH PROVERB)[root@Fizzgig C]# cat replacetabs.c /* replacetabs.c */ /* Replace all tabs in a file, given through standard input, */ /* with a give number of spaces. */ /* Default is 4 spaces. Tabs must be replaces by >0 spaces. */ /* Example: "replacetabs 3 < my.txt" */ /* */ /* Author: Zach Tomaszewski */ /* Date: 23 Jan 2003 */ #include #include #include int main(int argc, char *argv[]){ int tabstop = 4; int nextChar = 0; int charCount =0; /* Check that input is in correct format */ if (argc == 2 && isdigit(*argv[1]) && atoi(argv[1]) > 0){ tabstop = atoi(argv[1]); }else if (argc == 1) { //use default tabstop value }else{ printf("Usage: replacetabs [tabstop]\n"); printf("\t Replaces all tabs with spaces until the next tabstop.\n"); printf("\t [tabstop] must be greater than 0. Default = 4.\n"); printf("Examples:\n"); printf("\t replacetabs < my.txt\n"); printf("\t replacetabs 5 out.txt \n"); exit(1); } /* Work through input, keeping track of current column */ nextChar = getchar(); while(nextChar != EOF) { if (nextChar == *"\n") { //compare to int value of "\n" charCount = 0; //reset line count putchar(nextChar); }else if (nextChar == *"\t"){ do{ putchar(*" "); //replace with a space charCount++; }while(charCount % tabstop != 0); //add spaces till next tabstop }else{ putchar(nextChar); charCount++; } nextChar = getchar(); } } [root@Fizzgig C]# cat makefile replacetabs: replacetabs.o gcc -g replacetabs.o -o replacetabs replacetabs.o: replacetabs.c gcc -g -c replacetabs.c [root@Fizzgig C]# make gcc -g -c replacetabs.c gcc -g replacetabs.o -o replacetabs [root@Fizzgig C]# replacetabs < isort.ct /* An example of sorting a list of strings by */ /* rearranging the pointers and not moving the */ /* strings themselves. WP--9/99 */ #include #include /* swap the pointers that s and t point to */ void swap(char **s, char **t) { char* u; u = *s; *s = *t; *t = u; } /* Sort the n elements of v[] using an insertion sort */ /* v is assumed to be an array of pointers to strings */ /* This rearranges the pointers in array v. */ void isort(char **v, int n) { int i, j; for(i = 1; i0; j--) { if(strcmp(v[j],v[j-1])<0) swap(v+j, v+j-1); } } } /* Short main program to test isort() */ void main() { int i; char *a[] = {"oranges", "grapes", "peaches", "apples", "pears", "mangos", "lychees"}; printf("Unsorted:\n"); for(i = 0; i<7; i++) printf("%s\n",a[i]); isort(a, 7); printf("\nSorted:\n"); for(i = 0; i<7; i++) printf("%s\n",a[i]); } [root@Fizzgig C]# replacetabs 6 < prime.txt Table of Prime Numbers 0 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97 101 103 107 109 113 127 131 137 139 149 151 157 163 167 173 179 181 191 193 197 199 211 223 227 229 233 239 241 251 257 263 269 271 277 281 283 293 307 311 313 317 331 337 347 349 353 359 367 373 379 383 389 397 401 409 419 421 431 433 439 443 449 457 461 463 467 479 487 491 499 503 509 521 523 541 [root@Fizzgig C]# exit Script done on Thu Jan 23 09:23:35 2003