我分配了一段代码来查找某种数据类型可以容纳的最大值。我使用滚动1测试通过向左移动来执行此操作。对于int,char,short int和long int来说,它可以正常工作,但是我无法使它适用于unsigned in和unsigned char。代码会运行,但是到那个时候,它只会卡住而不会输出任何内容。请在下面附加我的整个代码。我怎样才能使它正常工作,我在做什么错。我确保使用%u而不是%d,我不确定我还需要更改什么。谢谢!!
//
// File name: ewh9320_proj2_data_types_rotate.c
// Author: Ethan Hall
// Created for RIT CMPR271 on 9/25/19
// Purpose: To find the maximum value of bits used for each data type
//
#include <stdio.h>
#include <math.h>
int main(void)
{
//int
int overflow0, previous0;
while(1)
{
previous0 = overflow0;
overflow0 = 1 + (previous0<<1);
if(previous0 > overflow0)
{
printf("int:\n");
printf("The max value is %d\n\n", previous0);
break;
}
}
//char
char overflow1, previous1;
while(1)
{
previous1 = overflow1;
overflow1 = 1 + (previous1<<1);
if(previous1 > overflow1)
{
printf("char:\n");
printf("The max value is %d\n\n", previous1);
break;
}
}
//short int
short int overflow2, previous2;
while(1)
{
previous2 = overflow2;
overflow2 = 1 + (previous2<<1);
if(previous2 > overflow2)
{
printf("short int:\n");
printf("The max value is %d\n\n", previous2);
break;
}
}
//unsigned int
unsigned int overflow3, previous3;
while(1)
{
previous3 = overflow3;
overflow3 = 1 + (previous3<<1);
if(previous3 > overflow3)
{
printf("unsigned int:\n");
printf("The max value is %u\n\n", previous3);
break;
}
}
//unsigned char
unsigned char overflow4, previous4;
while(1)
{
previous4 = overflow4;
overflow4 = 1 + (previous4<<1);
if(previous4 > overflow4)
{
printf("unsigned char:\n");
printf("The max value is %d\n\n", previous4);
break;
}
}
//long int
long int overflow5, previous5;
while(1)
{
previous5 = overflow5;
overflow5 = 1 + (previous5<<1);
if(previous5 > overflow5)
{
printf("long int:\n");
printf("The max value is %ld\n\n", previous5);
break;
}
}
}
第二个不会运行通过int64_t的程序:
int main(void)
{
//int8_t
int8_t overflow0, previous0;
while(1)
{
previous0 = overflow0;
overflow0 = 1 + (previous0<<1);
if(previous0 > overflow0)
{
printf("int8_t:\n");
printf("The max value is %d\n\n", previous0);
break;
}
}
//uint8_t
uint8_t overflow1, previous1;
while(1)
{
previous1 = overflow1;
overflow1 = 1 + (previous1<<1);
if(previous1 > overflow1)
{
printf("uint8_t:\n");
printf("The max value is %u\n\n", previous1);
break;
}
}
//int16_t
int16_t overflow2, previous2;
while(1)
{
previous2 = overflow2;
overflow2 = 1 + (previous2<<1);
if(previous2 > overflow2)
{
printf("int16_t:\n");
printf("The max value is %d\n\n", previous2);
break;
}
}
//uint16_t
uint16_t overflow3, previous3;
while(1)
{
previous3 = overflow3;
overflow3 = 1 + (previous3<<1);
if(previous3 > overflow3)
{
printf("uint16_t:\n");
printf("The max value is %u\n\n", previous3);
break;
}
}
//int32_t
int32_t overflow4, previous4;
while(1)
{
previous4 = overflow4;
overflow4 = 1 + (previous4<<1);
if(previous4 > overflow4)
{
printf("int32_t:\n");
printf("The max value is %d\n\n", previous4);
break;
}
}
//uint32_t
uint32_t overflow5, previous5;
while(1)
{
previous5 = overflow5;
overflow5 = 1 + (previous5<<1);
if(previous5 > overflow5)
{
printf("uint32_t:\n");
printf("The max value is %u\n\n", previous5);
break;
}
}
//int64_t
int64_t overflow6, previous6;
while(1)
{
previous6 = overflow6;
overflow6 = 1 + (previous6<<1);
if(previous6 >= overflow6)
{
printf("int64_t:\n");
printf("The max value is %lld\n\n", previous6);
break;
}
}
//uint64_t
uint64_t overflow7, previous7;
while(1)
{
previous7 = overflow7;
overflow7 = 1 + (previous7<<1);
if(previous7 > overflow7)
{
printf("uint64_t:\n");
printf("The max value is %llu\n\n", previous7);
break;
}
}
//uintptr_t
uintptr_t overflow8, previous8;
while(1)
{
previous8 = overflow8;
overflow8 = 1 + (previous8<<1);
if(previous8 > overflow8)
{
printf("uintptr_t:\n");
printf("The max value is %lu\n\n", previous8);
break;
}
}
//intmax_t
intmax_t overflow9, previous9;
while(1)
{
previous9 = overflow9;
overflow9 = 1 + (previous9<<1);
if(previous9 > overflow9)
{
printf("intmax_t:\n");
printf("The max value is %ld\n\n", previous9);
break;
}
}
}
最佳答案
我实际上发现,通过在我的if语句中添加> =可以解决问题。谢谢!