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使用纯C语言,去除一个字符串开头和结尾的空格,内部若有连续空格只保留一个。
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#include <stdio.h>
#include <stdlib.h> #include <string.h> void trimSpace(char *pStr) { if(NULL == pStr) return; int low = 0; int high = 0; int strLen = strlen(pStr); /**< 去除字符串前面的空格 */ while(pStr[high] == ‘ ‘ && high < strLen) { ++high; } while(high < strLen) { if(pStr[high] == ‘ ‘) // 读取连续空格,并压缩为一个空格 { pStr[low++] = ‘ ‘; while(pStr[high] == ‘ ‘ && high < strLen) { ++high; } } else // 读取连续单词 { while(pStr[high] != ‘ ‘ && high < strLen) { pStr[low++] = pStr[high++]; } } } /**< 去除字符串末尾的空格 */ if(pStr[low - 1] == ‘ ‘) { pStr[low - 1] = ‘\0‘; } else { pStr[low] = ‘\0‘; } } int main() { int size = 1024; char *pStr = malloc(sizeof(char) * size); gets(pStr); trimSpace(pStr); printf("%s", pStr); free(pStr); return 0; } |
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原文地址:http://www.cnblogs.com/fengkang1008/p/4789901.html