C语言基本数据类型

C语言基本数据类型及类型长度

/**
char, int, float, double, long, short and 组合关键字signed, unsigned, void

sizeof();获取一个数据类型的长度
**/
main(){
printf(“char的占据的byte为%d \n”,sizeof(char));
printf(“int的占据的byte为%d \n”,sizeof(int));
printf(“float的占据的byte为%d \n”,sizeof(float));
printf(“double的占据的byte为%d \n”,sizeof(double));
printf(“long的占据的byte为%d \n”,sizeof(long));
printf(“short的占据的byte为%d \n”,sizeof(short));

printf("signed int的占据的byte为%d \n",sizeof(signed int));      // -2的31次方~ 2的31次方-1 printf("unsigned int的占据的byte为%d \n",sizeof(unsigned int));    //0~ 2的32次方-1 system("pause");

}

C语言占位符

/**
%d - int
%ld – long int
%c - char
%f - float
%u – 无符号数
%hd – 短整型 half int
%lf – double
%x – 十六进制输出 int 或者long int 或者short int
%o - 八进制输出
%s – 字符串
**/