35 lines
961 B
C
35 lines
961 B
C
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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int main() {
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FILE *inputfile = fopen("./input", "r");
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char line[100] = { 0 };
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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 *concat = malloc(sizeof(char) * length);
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for (int i = 0; i < length - 1; i++) {
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int currentChar = (int) line[i];
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if (currentChar >= 49 && currentChar <= 57) {
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int len = strlen(concat);
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concat[len] = line[i];
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}
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}
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concat[strlen(concat)] = '\0';
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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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trimmed[2] = '\0';
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sum += atoi(trimmed);
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}
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fclose(inputfile);
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printf("Sum: %d\n", sum);
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}
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