C++ int类型最大最小数字（16进制） |
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先上结论：
signed int max = 0x7fffffff signed int min = 0x8fffffff unsigned int max = 0xffffffff 验证： 以下为转载看到的一篇博客，链接在结尾。 #include "stdafx.h" int main(int argc, char *argv[]) { //unsigned types min (为数值0） unsigned char u_char_min = 0; unsigned short u_short_min = 0; unsigned int u_int_min = 0; unsigned long u_long_min = 0; //unsigned types max (最小值取反为最大值) unsigned char u_char_max = ~u_char_min; unsigned short u_short_max= ~u_short_min; unsigned int u_int_max = ~u_int_min; unsigned long u_long_max = ~u_long_min; //signed types max （无符号最大值除以2为有符号数最大值） char char_max = (char)(u_char_max >> 1); short short_max = (short)(u_short_max >> 1); int int_max = (int)(u_int_max >> 1); long long_max = (long)(u_long_max >> 1); //signed types min (符号数最大值再加1， 为符号数最小值） char char_min = char_max + 1; short short_min = short_max + 1; int int_min = int_max + 1; long long_min = long_max +1; //输出结果： //unsigned types min printf("unsigned char min = %u 0x%x\n", u_char_min,u_char_min); printf("unsigned short min = %u 0x%x\n", u_short_min,u_short_min); printf("unsigned int min = %u 0x%x\n", u_int_min,u_int_min); printf("unsigned long min = %lu 0x%x\n", u_long_min ,u_long_min); //unsigned types max printf("unsigned char max = %u 0x%x\n", u_char_max,u_char_max); printf("unsigned short max = %u 0x%x\n", u_short_max,u_short_max); printf("unsigned int max = %u 0x%x\n", u_int_max,u_int_max); printf("unsigned long max = %lu 0x%x\n", u_long_max ,u_long_max); //signed types max printf("signed char max = %d 0x%x\n", char_max,char_max); printf("signed short max = %d 0x%x\n", short_max ,short_max); printf("signed int max = %d 0x%x\n", int_max ,int_max); printf("signed long max = %ld 0x%x\n", long_max,long_max); //signed types min printf("signed char min = %d 0x%x\n", char_min,char_min); printf("signed short min = %d 0x%x\n", short_min,short_min); printf("signed int min = %d 0x%x\n", int_min ,int_min); printf("signed long min = %ld 0x%x\n", long_min ,long_min); _getch(); return 0; }输出结果： unsigned char min = 0 0x0 unsigned short min = 0 0x0 unsigned int min = 0 0x0 unsigned long min = 0 0x0 unsigned char max = 255 0xff unsigned short max = 65535 0xffff unsigned int max = 4294967295 0xffffffff unsigned long max = 4294967295 0xffffffff signed char max = 127 0x7f signed short max = 32767 0x7fff signed int max = 2147483647 0x7fffffff signed long max = 2147483647 0x7fffffff signed char min = -128 0xffffff80 signed short min = -32768 0xffff8000 signed int min = -2147483648 0x80000000 signed long min = -2147483648 0x80000000 ———————————————— 版权声明：本文为CSDN博主「hjjdebug」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。 原文链接：https://blog.csdn.net/hejinjing_tom_com/article/details/7549667 |
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