Use getopt, replace stoi_mini with atoi
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9c84e90039
commit
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1 changed files with 6 additions and 32 deletions
36
head.c
36
head.c
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@ -4,8 +4,6 @@
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#include <stdlib.h>
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#include <unistd.h>
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int stoi_mini(char * str);
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int main(int argc, char *argv[]) {
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FILE * current_input_file;
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int i = 1, j = 0; char c;
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@ -15,15 +13,14 @@ int main(int argc, char *argv[]) {
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int error_occurred;
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if(argv[i][0] == '-') {
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if(argv[i][1] == 'n') {
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i++;
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chars_copy = stoi_mini(argv[i]);
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i++;
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while((c = getopt(argc, argv, "n:")) != -1) {
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if(c == 'n') {
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chars_copy = atoi(optarg);
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}
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}
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i = optind;
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if(argc - i > 1) {
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print_head = 1;
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}
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@ -66,26 +63,3 @@ int main(int argc, char *argv[]) {
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return 0;
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}
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}
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int stoi_mini(char * str) {
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int i, str_int = 0;
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for(i = 0; str[i] != '\0' && str[i] != ','; i++) {
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str_int *= 10;
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switch(str[i]) {
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case '0': str_int += 0; break;
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case '1': str_int += 1; break;
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case '2': str_int += 2; break;
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case '3': str_int += 3; break;
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case '4': str_int += 4; break;
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case '5': str_int += 5; break;
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case '6': str_int += 6; break;
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case '7': str_int += 7; break;
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case '8': str_int += 8; break;
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case '9': str_int += 9; break;
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default: return -1;
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}
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}
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return str_int;
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}
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