本文介绍的是截取字符串。函数说明设定起始位置和结束位置然后将字符添加到子字符串数组中字符为ascii编码且字符串的长度必须大于等于1,小于等于32767。#includestring.h#includestdio.h#includestdlib.h#include stdbool.hchar* interceptstr(char* string,unsigned int start, unsigned int end){unsigned int i,num1,num2, num3, num4,num5,num6;bool bool1, bool2, bool3,bool4,bool5,bool6,bool7, bool8;char* str1 nullptr,*str2nullptr;i 0;num1 0;num2 0;num3 0;num4 0;num5 0;num6 0;bool1 false;bool2 false;bool3 false;bool4 false;bool5 false;bool6 false;bool7 false;bool8 false;bool1 (string nullptr);if (bool1){puts(The string is Empty!\n);return str1;}num1 strlen(string);bool2 num1 0;if (bool2){puts(The length of the string is 0!\n);return str1;}bool3 (num1 1) (num1 32767);if (bool3 false){puts(The length of the string must greater than or equal to 1 and less than or equal to 32767 !\n);return str1;}bool4 end start;if (bool4 false){puts( Variable end must greater than or equal to variable start.\n);return str1;}num2 end 1;bool5 num2 num1;if (bool5){puts(Sub string exceeds the boundary of source string!\n);return str1;}num3 end - start 2;num4 sizeof(char);num5 num3 * num4;str2 (char*)malloc(num5);bool6 (num1 1) (start 0) (end 0);if (bool6){*str2 *string;*(str2 1) \0;}bool7 (num11)(start end);if (bool7){*str2 *(stringstart);*(str2 1) \0;}bool8 endstart;if (bool8){for (i start; i end; i){*(str2 num6) *(string i);num6;}*(str2 num6) \0;}return str2;}int main(){char ch01[] abcdefghigklmnop, *ch02 nullptr;ch02 interceptstr(ch01,0,6);printf(ch02 is %s\n, ch02);return 0;}