c语言，提取字符串中的字符 c语言中怎么从字符串中取字符
\u5728C\u8bed\u8a00\u4e2d\u5982\u4f55\u5c06\u4e00\u4e32\u5b57\u7b26\u4e32\u4e2d\u8bfb\u53d6\u51fa\u5176\u4e2d\u7684\u5355\u8bcd\u5355\u8bcd\u7684\u9996\u5b57\u6bcd\u662f\u5927\u5199\uff0c\u6240\u4ee5\u4f9d\u6b21\u8bfb\u53d6\u5148\u5224\u65ad\u54ea\u4e2a\u5728\u5927\u5199\u5b57\u6bcd\u8303\u56f4\u5185\uff0c\u7136\u540e\u8bfb\u53d6\u81f3\u540e\u4e00\u4e2a\u5927\u5199\u5b57\u6bcd\u7ed3\u675f\u524d\u7ed3\u675f\uff0c\u4f9d\u6b21\u8bfb\u636e\u597d\u4e86\uff0c\u601d\u8def\u5c31\u8fd9\u6837\u7684 ,\u5982\u679c\u4f60\u8981\u7a0b\u5e8f\uff0c\u6559\u79d1\u4e66\u4e0a\u6709\u8fd9\u6837\u7684\u4f8b\u9898\uff0c\u6211\u5c31\u4e0d\u5728\u8fd9\u513f\u732e\u4e11\u4e86
char s[]="ssssabedbewb";
int len;
char *p;
s[2]; //\u7b2c\u4e00\u79cd\u65b9\u6cd5
printf("\u8f93\u5165\u8f93\u5165\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\uff1a");
scanf("%d",&len);
printf("\u8f93\u5165\u5b57\u7b26\u4e32\uff1a");
p=malloc(len);
scanf("%s",p);
printf("%c",p[3]); //\u7b2c\u4e8c\u79cd\u65b9\u6cd5
\u663e\u7136\u7b2c\u4e8c\u79cd\u65b9\u6cd5\u66f4\u7075\u6d3b\uff0c\u4e0d\u8fc7\u5c31\u662f\u6709\u70b9\u70e6
需要#include "string.h"
常用的函数有strcpy,strlen,strcmp,strchr,strstr等等
将提取的串转为数值
atol转为长整形
atoi转为整形
atof转为浮点形
绛旓細C涓殑瀛楃涓插氨鏄竴涓瓧绗︽暟缁銆傚锛歝har s[10]="wo shi SB";char c;鍙栨渶宸﹁竟鐨勫瓧绗,灏辨槸c=s[0];
绛旓細int main() { char str[] = "hello, world!";int len = sizeof(str) / sizeof(char); // 璁＄畻瀛楃涓茬殑闀垮害 for (int i = 0; i < len; i++) { printf("%c ", str[i]); // 閫愪釜杈撳嚭瀛楃涓蹭腑鐨勫瓧绗 } return 0;} ...
绛旓細string url = "www.baidu.com";string[] split = url.Split('.');string result = split[1];Label1.Text = result;
绛旓細include<stdio.h>#include<string.h>int main(){ char s[20]; int i; printf("杈撳叆鍖呭惈鏁板瓧鐨勫瓧绗︿覆锛"); scanf("%s",s); printf("鍏朵腑鏁村瀷鏁板瓧浣嶄负锛"); for(i=0;i<strlen(s);i++) { if(s[i]>=48 && s[i]<=57) { printf("%d",(int)s[...
绛旓細h> int main() { char s[100];int i;scanf("%s",s);for(i = 0;s[i];i++) { if(a[i] >= 'a' && a[i] <= 'z') s[i] -= 'a' - 'A';else if(a[i] >= 'A' && a[i] <= 'Z') a[i] -= 'A' - 'a';} printf("%s\n",s);return 0;} ...
绛旓細鐢ㄦ爣鍑c搴涓殑瀛楃涓鎿嶄綔鍑芥暟灏卞彲浠ヤ簡 闇瑕#include "string.h"甯哥敤鐨勫嚱鏁版湁strcpy,strlen,strcmp,strchr,strstr绛夌瓑
绛旓細鍙互鐢╩emcpy()锛屽涓嬮潰浠ｇ爜锛歝har s="abcdefg";char str[4]={0};鎴戜滑瑕佹埅鍙"def"鍒欏彲浠ヨ繖鏍凤細memcpy(str,s+3,3);鐢ㄦ硶灏辨槸memcpy(缂撳啿鍖,瀛楃涓绗琻涓厓绱,鎴彇闀垮害m);
绛旓細鍦C璇█涓瓧绗︿覆鏈変袱绉嶈〃绀烘柟娉曚竴绉嶆槸瀛楃鎸囬拡 锛屼竴绉嶆槸瀛楃鏁扮粍銆俢onst char *str = "helllo world"; //瀛楃鎸囬拡鎸囧悜瀛楃涓 char str[] = "hello world"; //瀛楃鏁扮粍淇濆瓨瀛楃涓层傚瓧绗︽寚閽堬紝鍙互鐪嬩綔瀛楃鏁扮粍锛屼袱鑰呴兘鍙互鐢ㄧ淮鏁版潵涓涓竴涓殑鎿嶄綔瀛楃銆傜ず渚嬪涓嬶細include <stdio.h>#include <...
绛旓細搴旇杩欐牱瀹氫箟 char *x="abcdefg"锛岃繖鏍峰畾涔夊氨鏄畾涔変簡涓涓瀛楃涓鍙橀噺锛岃屼綘鐨勫畾涔塩har x 鍙槸瀹氫箟x涓哄瓧绗﹀彉閲忥紝鍦ㄨ祴鍊肩殑鏃跺欏彧鑳借祴缁檟鍗曚釜瀛楃锛屽x='a',瑕佹悶娓呮 瀛楃 鍜 瀛楃涓 鐨勬蹇 鑷充簬浣犺鐨鎻愬彇瀛楃锛鍙涓嬫柟娉 for(i=0; i<n; i++)//n鏄瓧绗︿覆鍙橀噺y鐨勫瓧绗涓暟 { y[i]=x[...
绛旓細1銆佸鍒瀛楃涓 C 璇█涓浣跨敤搴撳嚱鏁 strcpy 鏉ヨ繘琛屽瓧绗︿覆澶嶅埗鎿嶄綔: char *strcpy(char *dst , char const *src); 鍑芥暟strcpy 鎺ユ敹涓や釜瀛楃涓插弬鏁,骞跺皢鍙傛暟 src 瀛楃涓插鍒跺埌 dst 鍙傛暟銆備娇鐢 strcpy 鍑芥暟鏃堕渶瑕佹敞鎰忕殑鏄,蹇呴』淇濊瘉鐩爣瀛楃鏁扮粍 dst 鐨勯暱搴﹁冻澶熷瓨鏀炬簮瀛楃鏁扮粍 src 鐨勫唴瀹广 濡傛灉src 姣 dst 闀,...
