linux fgets r n

char *fgets(char *str, int n, FILE *stream);

char buffer[100];
if (fgets(buffer, sizeof(buffer), stream)) {
    size_t len = strlen(buffer);
    if (len > 0 && buffer[len - 1] != '\n') {
        // 需要继续读取剩余的部分
        char extra[100];
        while (fgets(extra, sizeof(extra), stream)) {
            strcat(buffer, extra);
            len += strlen(extra);
            if (len > 0 && buffer[len - 1] == '\n') break;
        }
    }
}

char buffer[100];
while (fgets(buffer, sizeof(buffer), stream)) {
    // 处理读取到的数据
}
if (feof(stream)) {
    // 文件正常结束
} else if (ferror(stream)) {
    // 发生了读取错误
}

#include <stdio.h>
#include <string.h>

int main() {
    FILE *file = fopen("example.txt", "r");
    if (!file) {
        perror("Failed to open file");
        return 1;
    }

    char buffer[100];
    while (fgets(buffer, sizeof(buffer), file)) {
        printf("%s", buffer);
    }

    fclose(file);
    return 0;
}