C语言：从键盘输入两个字符串，比较它们的大小？ C语言编程：从键盘上输入两个字符串，判断两个字符串是否相等。
C\u8bed\u8a00\u7f16\u7a0b\uff0c\u8f93\u5165\u4e24\u4e2a\u5b57\u7b26\u4e32\uff0c\u6bd4\u8f83\u4ed6\u4eec\u7684\u5927\u5c0f\u5e76\u8f93\u51fa\u6bd4\u8f83\u7ed3\u679c\u5982\u679c\u53ea\u662f\u95ee\u4e2a\u7b97\u6cd5\uff0c\u6211\u53ef\u4ee5\u544a\u8bc9\u4f60\uff0c\u4f46\u662f\u5982\u679c\u662f\u4f60\u8981\u5168\u90e8
\uff0c\u90a3\u5c31\u4e0d\u53ef\u4ee5\u4e86\uff0c\u4f5c\u4e1a\u8981\u81ea\u5df1\u505a\u7684\u554a\uff01
\u5982\u679c\u4f60\u8981\u7528\u6237\u8f93\u51652\u4e2a\u5b57\u7b26\u4e32\u4f5c\u6bd4\u8f83\u7684\u8bdd
\u53ef\u4ee5\u7528\u201c
\u201d\u6765\u533a\u5206\u5b57\u7b26\u4e321\u4e0e\u5b57\u7b26\u4e322
\u7136\u540e\u628a2\u4e2a\u5b57\u7b26\u4e32\u5b58\u52302\u4e2a\u6570\u7ec4\u91cc\u53bb\u6bd4
int
i=1,j=1;
char
a[20],b[20]
if
(c=getchar()!="
")
then
{
a[i]=c;
i++;
}
else
{
b[j]=c;
j++;
}
\u7136\u540e\u7528for\u5faa\u73af\u4e00\u4e2a\u4e00\u4e2a\u6bd4\u4ed6\u4eec\u7684\u5927\u5c0f\u5c31\u53ef\u4ee5\u4e86\uff0c\u5982\u679c\u6709\u4e00\u4e2a\u5927\u4e86\u5c31return
\u5927\u7684\u503c\uff0c\u5982\u679c\u9047\u5230\u4e00\u4e2a\u6570\u7ec4\u4e3a\u7a7a\u4e86\uff0c\u4e5freturn
\u53e6\u5916\u4e00\u4e2a\u5b57\u7b26\u4e32\u5c31\u597d\u4e86\u3002
\u5176\u5b83\u7684\u8981\u4f60\u81ea\u5df1\u60f3\u4e86\uff0c\u5982\u679c\u5168\u544a\u4f60\uff0c\u90a3\u4f60\u4e5f\u8fd8\u662f\u4ec0\u4e48\u4e5f\u5b66\u4e0d\u4f1a\uff0c\u7b97\u6cd5\u544a\u4f60\u4e86\u5c31\u53ef\u4ee5\u4e86\u3002\u7ed9\u4e0d\u7ed9\u5206\u4f60\u81ea\u5df1\u770b\u7740\u529e\u5427
\u4e3b\u8981\u7684\u9519\u8bef\u662f\u56e0\u4e3ascanf \uff08\u201c%s\uff0c%s\u201d\uff0c&str1\uff0c&str2\uff09\uff1b\u4e2d%s\uff0c%s\u4e4b\u95f4\u7684\u9017\u53f7\u9020\u6210\u7684\uff0c\u52a0\u4e0a\u9017\u53f7\u4e4b\u540e\u4f1a\u5bfc\u81f4\u7b2c\u4e8c\u4e2a\u8f93\u5165\u7684\u5b57\u7b26\u4e32\u51fa\u73b0\u95ee\u9898\u3002
\u53ef\u4ee5\u5c06scanf \uff08\u201c%s\uff0c%s\u201d\uff0c&str1\uff0c&str2\uff09\uff1b\u6539\u6210scanf \uff08\u201c%s%s\u201d\uff0c&str1\uff0c&str2\uff09\uff1b
if \uff08str1[j] == \u2018\0\u2019 || str2[j] == \u2018\0\u2019\uff09\u5e94\u8be5\u6539\u4e3a if \uff08str1[j] == \u2018\0\u2019 && str2[j] == \u2018\0\u2019\uff09\u8fd9\u6837\u53ef\u4ee5\u6709\u6548\u7684\u89e3\u51b3\u4f60\u7684\u95ee\u9898\u3002
\u6b63\u786e\u4ee3\u7801\u4f9b\u53c2\u8003\uff1a
#include
int main() {
char str1[10]\uff0cstr2[10]\uff1b
int j = 0\uff0cflag = 0\uff1b
printf(\u201c\n\u201d)\uff1b
scanf(\u201c%s%s\u201d\uff0c&str1\uff0c&str2)\uff1b
while (str1[j] == str2[j]) {
j++\uff1b
if (str1[j] == \u2018\0\u2019 && str2[j] ==\u2018\0\u2019) {
flag = 1\uff1b
break\uff1b
}
}
if (flag==1) {
printf(\u201cthe two string are equal.\u201d)\uff1b
} else {
printf(\u201cthe two string are not equal.\u201d)\uff1b
}
}
\u6269\u5c55\u8d44\u6599\uff1a
scanf\u51fd\u6570\u8fd4\u56de\u6210\u529f\u8bfb\u5165\u7684\u6570\u636e\u9879\u6570\uff0c\u8bfb\u5165\u6570\u636e\u65f6\u9047\u5230\u4e86\u201c\u6587\u4ef6\u7ed3\u675f\u201d\u5219\u8fd4\u56deEOF\u3002
\u7a7a\u767d\u5b57\u7b26\u4f1a\u4f7fscanf\u51fd\u6570\u5728\u8bfb\u64cd\u4f5c\u4e2d\u7565\u53bb\u8f93\u5165\u4e2d\u7684\u4e00\u4e2a\u6216\u591a\u4e2a\u7a7a\u767d\u5b57\u7b26\u3002
\u4e00\u4e2a\u975e\u7a7a\u767d\u5b57\u7b26\u4f1a\u4f7fscanf()\u51fd\u6570\u5728\u8bfb\u5165\u65f6\u5254\u9664\u6389\u4e0e\u8fd9\u4e2a\u975e\u7a7a\u767d\u5b57\u7b26\u76f8\u540c\u7684\u5b57\u7b26\u3002
scanf\u4f7f\u7528\u6ce8\u610f\uff1a
\u5728\u9ad8\u7248\u672c\u7684 Visual Studio \u7f16\u8bd1\u5668\u4e2d\uff0cscanf \u88ab\u8ba4\u4e3a\u662f\u4e0d\u5b89\u5168\u7684\uff0c\u88ab\u5f03\u7528\uff0c\u5e94\u5f53\u4f7f\u7528scanf_s\u4ee3\u66ff scanf\u3002
\u5bf9\u4e8e\u5b57\u7b26\u4e32\u6570\u7ec4\u6216\u5b57\u7b26\u4e32\u6307\u9488\u53d8\u91cf\uff0c\u7531\u4e8e\u6570\u7ec4\u540d\u53ef\u4ee5\u8f6c\u6362\u4e3a\u6570\u7ec4\u548c\u6307\u9488\u53d8\u91cf\u540d\u672c\u8eab\u5c31\u662f\u5730\u5740\uff0c\u56e0\u6b64\u4f7f\u7528scanf()\u51fd\u6570\u65f6\uff0c\u4e0d\u9700\u8981\u5728\u5b83\u4eec\u524d\u9762\u52a0\u4e0a\u201c&\u201d\u64cd\u4f5c\u7b26\u3002
\u53ef\u4ee5\u5728\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u4e2d\u7684\u201c%\u201d\u5404\u683c\u5f0f\u5316\u89c4\u5b9a\u7b26\u4e4b\u95f4\u52a0\u5165\u4e00\u4e2a\u6574\u6570\uff0c\u8868\u793a\u4efb\u4f55\u8bfb\u64cd\u4f5c\u4e2d\u7684\u6700\u5927\u4f4d\u6570\u3002
scanf\u51fd\u6570\u4e2d\u6ca1\u6709\u7c7b\u4f3cprintf\u7684\u7cbe\u5ea6\u63a7\u5236\u3002
scanf\u4e2d\u8981\u6c42\u7ed9\u51fa\u53d8\u91cf\u5730\u5740\uff0c\u5982\u7ed9\u51fa\u53d8\u91cf\u540d\u5219\u4f1a\u51fa\u9519\u3002
\u5728\u8f93\u5165\u591a\u4e2a\u6570\u503c\u6570\u636e\u65f6\uff0c\u82e5\u683c\u5f0f\u63a7\u5236\u4e32\u4e2d\u6ca1\u6709\u975e\u683c\u5f0f\u5b57\u7b26\u4f5c\u8f93\u5165\u6570\u636e\u4e4b\u95f4\u7684\u95f4\u9694,\u5219\u53ef\u7528\u7a7a\u683c\uff0cTAB\u6216\u56de\u8f66\u4f5c\u95f4\u9694\u3002
C\u7f16\u8bd1\u5728\u78b0\u5230\u7a7a\u683c\uff0cTAB\uff0c\u56de\u8f66\u6216\u975e\u6cd5\u6570\u636e(\u5982\u5bf9\u201c%d\u201d\u8f93\u5165\u201c12A\u201d\u65f6\uff0cA\u5373\u4e3a\u975e\u6cd5\u6570\u636e)\u65f6\u5373\u8ba4\u4e3a\u8be5\u6570\u636e\u7ed3\u675f\u3002
\u5728\u8f93\u5165\u5b57\u7b26\u6570\u636e\uff08%c\uff09\u65f6\uff0c\u82e5\u683c\u5f0f\u63a7\u5236\u4e32\u4e2d\u65e0\u975e\u683c\u5f0f\u5b57\u7b26\uff0c\u5219\u8ba4\u4e3a\u6240\u6709\u8f93\u5165\u7684\u5b57\u7b26\u5747\u4e3a\u6709\u6548\u5b57\u7b26\u3002
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-scanf
用strcmp函数即可。
int strcmp( const char *str1, const char *str2 );
返回值
less than 0 str1 is less than str2
equal to 0 str1 is equal to str2
greater than 0 str1 is greater than str2
#include <stdio.h>
#include <string.h>
int main()
{
char str1[100], str2[100];
printf("intput str1 :");
gets(str1);
printf("intput str2 :");
gets(str2);
switch (strcmp(str1, str2)) // 比较str1, str2
{
case 0: puts("result: str1 = str2."); break;
case 1: puts("result: str1 > str2."); break;
case -1: puts("result: str1 < str2."); break;
}
return 0;
}
//看清楚，这个strcmp是我编的啊！不喜欢这个名子，你可以换。
#include<stdio.h>
int strcmp(char *t,char *s)
{
int i=0;
while(t[i]==s[i]&&s[i]&&t[i]) i++;
if(s[i]=='\0'&&t[i]=='\0')
return 0;//表示相等。
else if(t[i]>s[i]) return 1;//表示第一个大于第二个。
else return -1;//表示第一个小于第二个。
}
int main()
{
char s1[81],s2[81];
gets(s1);
gets(s2);
printf("%d\n",strcmp(s1,s2));
return 0;
}
绛旓細cin >> pszStringA; // 杈撳叆瀛楃涓 A cin >> pszStringB; // 杈撳叆瀛楃涓 A int nStringBLength = strlen( pszStringB ); // 姹傚緱瀛楃涓 B 鐨勯暱搴 int i = 0;// 閬嶅巻瀛楃涓 B 閲岄潰鐨勬瘡涓涓瓧绗 for( i = 0; i < nStringBLength; i++ ){ // 杩欓噷涓嶇敤瑙ｉ噴浜嗗惂 ...
绛旓細include <stdio.h>int main(){ char str1[100],str2[100]; char *p,*p1,*p2; gets(str1); gets(str2); for(p=str1;*p!='\0';p++) { for(p1=p;p2=str2;*p1==*p2;p1++,p2++); if(*p2=='\0') { printf("%d",p-str1); return 0...
绛旓細void main(){ char str1[N],str2[N];int i=0,j=0;gets(str1); //鑾峰彇瀛楃涓诧紝鍥炶溅缁撴潫 gets(str2);while(str1[i]!='\0')//璁＄畻str1鏁扮粍闀垮害 i++;while(str2[j]!='\0')//鎶妔tr2杩炴帴鍒皊tr1灏惧反 { str1[i++]=str2[j];j++;} for(int n=0;n...
绛旓細; //杈撳叆涓2; char *newstr = (char*)calloc(strlen(string1) + strlen(string2) + 1, sizeof(char)); //鍒涘缓涓涓垰濂藉绾涓や釜涓茬殑鏂颁覆; if(!newstr) //妫鏌ユ槸鍚﹀垱寤烘垚鍔; { printf("鍐呭瓨涓嶈冻,绋嬪簭缁撴潫!\n"); exit(1);...
绛旓細鎬濊矾锛氫袱涓瓧绗︿覆鐨勬嫾鎺ュ彲浠ヤ娇鐢╯trcat鍑芥暟銆俿trcat鍑芥暟鍘熷瀷锛 char *strcat(char *s1,char *s2);闇瑕佸紩鍏ュご鏂囦欢锛#include <string.h> 鍔熻兘锛氭妸s2鎵鎸囧瓧绗︿覆娣诲姞鍒皊1缁撳熬澶勫苟娣诲姞'\0'銆傛敞鎰忥細s1蹇呴』鏈夎冻澶熺殑绌洪棿鏉ュ绾硈1鍜宻2鐨勫瓧绗︿覆銆傚弬鑰冧唬鐮侊細include "stdio.h" #include "string.h" int ...
绛旓細printf("璇杈撳叆绗簩涓瓧绗︿覆锛\n");gets(s2);printf("璇疯緭鍏ユ彃鍏ヤ綅缃,娉ㄦ剰涓嶈澶т簬%d锛歕n",strlen(s1));scanf("%d",&n);for(i=0;i<(int)strlen(s1);i++)s[i]=s1[i];for(i=0;i<(int)strlen(s2);i++){ s[n+strlen(s2)+i]=s1[n+i];s[n+i]=s2[i];} puts(s);}...
绛旓細include<stdio.h> include<string.h> main(){ char s1[256],s2[256];char *ptr;char *ptr1;scanf("%s",s1);scanf("%s",s2);ptr1=s1;ptr=strstr(s1,s2);if(ptr)printf("YES\N");}
绛旓細return 0;}int main(){ int i, len, j=0; char s1[100], s2[100], s3[100];/*淇濆瓨涓や釜瀛楃涓插拰浜ら泦涓*/ char* s[2]={s1,s2};/*鐢ㄤ竴涓暟缁剆鏉ョ鐞唖1鍜宻2浠ヤ究鍦ㄤ笅闈㈢敤for寰幆澶勭悊*/ for(i=0; i<2; i++){/*渚濇杈撳叆涓や釜瀛楃涓*///杩欓噷浣跨敤do,while寰幆锛
绛旓細鎵浠ュ綋閬囧埌杩斿洖鍊间负NULL鐨勬儏鍐垫椂锛屽簲浣跨敤ferror鎴杅eof鍑芥暟妫鏌ユ槸鍙戠敓閿欒杩樻槸閬囧埌EOF銆2銆佷緥绋嬶細include <stdio.h>int main(){ char buffer[5];//瀹氫箟缂撳瓨瀛楃鏁扮粍buffer gets(buffer);//鐢╣ets鍑芥暟浠巗tdin娴佷腑璇诲叆瀛楃涓诧紝鍥犱负buffer闀垮害鏄5锛杈撳叆涓嶈兘瓒呰繃4涓瓧绗 printf("%s",buffer);//...
绛旓細include"stdio.h"include"string.h"void main(){ char a[100],b[100];int i,n,m,k;printf("璇杈撳叆绗竴涓瓧绗︿覆(a):");gets(a);n=strlen(a);printf("鍦ㄨ緭鍏ヨ鎻掑叆鐨勫瓧绗︿覆(b):");gets(b);m=strlen(b);printf("璇疯緭鍏ヨ鎻掑叆鐨勪綅缃(k涓嶈兘瓒呭嚭瀛楃涓瞐鐨勯暱搴)锛");scanf("%d",...
