在C中读取文件时出现奇怪的循环

我正在用C写一个代码来读取矩阵（3的平方矩阵），问题就在这里

   for (i = 0; ((i < N) && (temp = fgetc(arquivo)) != '\n') ; i++) {
        for (j = 0; j < N; j++) {
            A[i][j] = temp;
        }
    }

问题就在这里

   for (i = 0; ((i < N) && (temp = fgetc(arquivo)) != '\n') ; i++) {
        for (j = 0; j < N; j++) {
            A[i][j] = temp;
        }
    }

5 
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5 
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5 
AAAAA 
AAAAA 
AAAAA 
AAAAA 
AAAAA 
5 
AAAAA 
AAAAA 
AAAAA 
AAAAA 
AAAAA 
6 
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XXXXXX 
6 
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6 
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6 
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6 
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6 
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5
AAAAA
AAAAA
AAAAA
AAAAA
AAAAA

   for (i = 0; ((i < N) && (temp = fgetc(arquivo)) != '\n') ; i++) {
        for (j = 0; j < N; j++) {
            A[i][j] = temp;
        }
    }

    for (i = 0; i < N; i++) {
        for(j = 0; (temp = fgetc(arquivo)) != '\n'; j++ ) {
            A[i][j] = temp;
        }
    }