C语言数据类型

C语言的基本数据类型有两种：一种是数值型，另一种是非数值型

数值型包括整型和非整型。

整型：int, short int,long int

非整型：float, double

非数值：char

而对于整型，又有短整型和长整型之分，还有有符号整型和无符号整型之分。

所以，加在一起，对于整型就有以下几种。

整型：int

短整型：short int

长整型：long int

无符号 短整型：unsigned short int

有符号 短整型：signed short int

无符号 长整型：unsigned long int

有符号 长整型：signed long int

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以下为对其相应各类型的大小进行测试的测试代码：

#include <stdio.h>
int main( )
{
    printf("-----about the char----\n");
    printf("sizeof(char) = %d\n", sizeof(char));
    printf("\n");
    printf("------about the int------\n");
    printf("sizeof(short int) = %d\n", sizeof(short int));
    printf("sizeof(unsigned short int) = %d\n", sizeof(unsigned short int));
    printf("sizeof(singed short int) = %d\n", sizeof(signed short int));


    printf("sizeof(int) = %d\n", sizeof(int));
    printf("sizeof(unsigned int) = %d\n", sizeof(unsigned int));
    printf("sizeof(signed int) = %d\n", sizeof(signed int));


    printf("sizeof(long int) = %d\n", sizeof(long int));
    printf("sizeof(unsigned long int) = %d\n", sizeof(unsigned long int));
    printf("sizeof(signed long int) = %d\n", sizeof(signed long int));
    printf("\n");
    printf("------about the float------\n");
    printf("sizeof(float) = %d\n", sizeof(float));
    printf("\n");
    printf("------about the double------\n");
    printf("sizeof(double) = %d\n", sizeof(double));

    return 0;
}

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输出结果如下：