51 lines
1 KiB
C
51 lines
1 KiB
C
#include <stdio.h>
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int main()
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{
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FILE *input;
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input = fopen("./input", "r");
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FILE *output;
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output = fopen("./output", "w");
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char inChar;
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char numbers[4];
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numbers[2] = '\n';
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numbers[3] = '\0';
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int numIndex = 0;
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while((inChar = fgetc(input)) != EOF) {
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if (inChar >= '0' && inChar <= '9' && numIndex == 0) {
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numbers[0] = inChar;
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numbers[1] = inChar;
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numIndex = 1;
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} else if (inChar >= '0' && inChar <= '9' && numIndex == 1) {
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numbers[1] = inChar;
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} else if (inChar == EOF || inChar == '\n' || inChar == '\0') {
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fputs(numbers, output);
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numIndex = 0;
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numbers[0] = '0';
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numbers[1] = '0';
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}
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}
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fclose(input);
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fclose(output);
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int sum = 0;
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input = fopen("./output", "r");
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while((inChar = fgetc(input)) != EOF) {
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if (inChar >= '0' && inChar <= '9' && numIndex == 0) {
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sum += (inChar - '0') * 10;
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numIndex = 1;
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} else if (inChar >= '0' && inChar <= '9' && numIndex == 1) {
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sum += inChar - '0';
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numIndex = 0;
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} else if (inChar == EOF)
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break;
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}
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printf("%d\n", sum);
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fclose(input);
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}
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