回答編集履歴
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test
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直接の回答ではありませんが、[平均値プログラムsscanfの返り値で](https://teratail.com/questions/140350)のBAを参考にされたらどうでしょう？
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[追記]
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sscanf()を使わなければ、こんな方法も有りますｄ＾＾
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```c
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usr~/test/c % cat ct0.c
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#include <stdio.h>
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#include <stdlib.h>
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//
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int read(void);
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int main(void)
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{
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printf("カウンタ=%d\n", read());
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//
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return 0;
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}
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/**
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*/
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int read(void)
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{
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int siz = 0;
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char *ptr = 0;
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char buf[1024];
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//
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if (fgets(buf, sizeof buf, stdin) != NULL) {
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siz = (int)strtol(buf, &ptr, 10);
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for (int i = 0; i < siz; i++) {
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int n = (int)strtol(ptr, &ptr, 10);
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printf("%d\n", n);
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}
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}
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//
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return siz;
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}
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//
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usr~/test/c % ./a.out
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4 1 2 3 4
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1
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カウンタ=4
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usr~/test/c %
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```
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