ASCLL码表以及字符的相加减

ASCLL码表完整版及解释_acssll码-CSDN博客

#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>#define MAX_PATH   256
char filename[MAX_PATH + 5];int isdigit(int c)
{if (c >= '0' && c <= '9')return 1;return 0;
}int main(int argc, char** argv)
{int kk1 = '0';printf("shuzu : %d \n", kk1);   //打印 : 48int kk0 = '3';printf("shuzu : %d \n", kk0);   //打印: 51  int kk2 = 'b';printf("shuzu : %d \n", kk2);   //打印 :  98int kk3 = '3' - '0';printf("shuzu : %d \n", kk3);   //打印 :  3int kk4 = 'b'-'3';printf("shuzu : %d \n", kk4);   //打印 :  47if (isdigit('5')) {printf("true");}else {printf("false");}getchar();return 0;
}

FR：徐海涛(hunkxu)