Question

用sizeof（数据类型）这个函数打印出各个数据类型在内存中所占字节数

用sizeof（数据类型）这个函数打印出各个数据类型在内存中所占字节数，数据类型是指所有的数据类型

Answer 1

这只是个表达式，是你所说的求数据类型的长度，比如sizeof(int),sizeof(float)等等，求出的字节数要看你的系统，不同的系统，所占的字节数是不一样的。

Answer 2

printf("%d,%d,%d,%d,%d,%d,%d,%d,%d", sizeof(int), sizeof(long), sizeof(long long), sizeof(short), sizeof(char), sizeof(float), sizeof(double), sizeof(int*), sizeof(float*));

Answer 3

#include <stdio.h>
void main ()
{
printf("Variables of type short use %d bytes\n", sizeof(short));
printf("Variables of type int use %d bytes\n", sizeof(int));
printf("Variables of type long use %d bytes\n", sizeof(long));
printf("Variables of type float use %d bytes\n", sizeof(float));
printf("Variables of type double use %d bytes\n", sizeof(double));
printf("Variables of type unsigned use %d bytes\n", sizeof(unsigned));
printf("Variables of type char use %d bytes\n", sizeof(char));
}

Answer 4

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