19 lines
451 B
C
19 lines
451 B
C
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#include <stdio.h>
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#include <stdbool.h>
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#define SIZE 10
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int main() {
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int arr[SIZE] = {2, 5, 3, 5, 1, 2, 6, 7, 8, 9};
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bool used[SIZE] = {false}; // 用于标记数字是否已被使用
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for (int i = 0; i < SIZE; ++i) {
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if (!used[arr[i]]) { // 检查当前值是否已被使用
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printf("First occurrence of %d\n", arr[i]);
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used[arr[i]] = true; // 标记该值为已使用
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}
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}
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return 0;
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}
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