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int main (int argc, char const *argv[]) { printf("Hello world!\n"); return 0; }
在C语言中,所有变量都必须先声明后使用。 C语言的基本数据类 基本数据类型有: int(整型)、float(单精度浮点型)、char(字符--一个字节)、short(短整型)、long(长整型)、double(双精度浮点型)。 另外,还存在 这些基本数据 类型的数组,结构、联合,指向这些类型的 ...
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