73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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typedef struct {
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char *name;
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char* value;
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} number;
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void replace(char *target, const char *needle, const char *replacement)
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{
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char buffer[1024] = { 0 };
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char *insert_point = &buffer[0];
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const char *tmp = target;
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size_t needle_len = strlen(needle);
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size_t repl_len = strlen(replacement);
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while (1) {
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const char *p = strstr(tmp, needle);
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if (p == NULL) { // walked past last occurrence of needle; copy remaining part
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strcpy(insert_point, tmp);
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break;
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}
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memcpy(insert_point, tmp, p - tmp); // copy part before needle
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insert_point += p - tmp;
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memcpy(insert_point, replacement, repl_len); // copy replacement string
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insert_point += repl_len;
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tmp = p + needle_len;
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}
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strcpy(target, buffer);
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}
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int main() {
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FILE *inputfile = fopen("./input", "r");
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char *line = malloc(sizeof(char) * 100);
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number numbers[9];
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char *names[9] = { "one", "two", "three", "four", "five", "six", "seven", "eight", "nine" };
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char *values[9] = { "on1e", "tw2o", "th3ree", "fo4ur", "fi5ve", "si6x", "se7ven", "ei8ght", "ni9ne" };
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for (int k = 0; k < 9; k++) {
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numbers[k].name = names[k];
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numbers[k].value = values[k];
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}
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int sum = 0;
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size_t len = 0;
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ssize_t read;
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if (inputfile == NULL) {
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printf("Input file not found. Exiting.");
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exit(1);
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}
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while (fgets(line, 100, inputfile)) {
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int length = strlen(line);
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char *cpline = malloc(sizeof(char) * 1024);
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strcpy(cpline, line);
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for (int i = 0; i < 9; i++) {
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char *name = numbers[i].name;
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char *value = numbers[i].value;
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replace(cpline, name, value);
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}
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char *concat = malloc(sizeof(char) * strlen(cpline));
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for (int j = 0; j < strlen(cpline) - 1; j++) {
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int currentChar = (int) cpline[j];
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if (currentChar >= '0' && currentChar <= '9') {
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concat[strlen(concat)] = cpline[j];
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}
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}
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char trimmed[3] = { 0 };
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trimmed[0] = concat[0];
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trimmed[1] = concat[strlen(concat) - 1];
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sum += atoi(trimmed);
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}
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fclose(inputfile);
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printf("%d\n", sum);
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}
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