Initial commit

2019-11-15 12:59:38 +01:00
parent 40a414d210
commit b880c3ccde
6814 changed files with 379441 additions and 0 deletions
@@ -0,0 +1,154 @@
+String operation
+
+#include<stdio.h>
+#include<conio.h>
+#include<string.h>
+int STRLEN(char*);
+int STRCPY(char*,char*);
+int STRCMP(char*,char*);
+int STRCAT(char*,char*,char*);
+int STRREV(char*);
+void main()
+{
+	int c;
+	char str[20],str1[10],str2[10],str3[20];
+	clrscr();
+	re:
+	printf("
+Enter choice=>");
+	printf("
+		1:string len.
+		2:string copy
+		3:string
+cmp.
+		4:string cat.
+		5:string rev.");
+	printf("
+		6:for exit=>");
+	scanf("%d",&c);switch(c)
+	{
+		case 1:
+			printf("Enter the string=>");
+			scanf("%s",&str1);
+			printf("string length=>%d
+",STRLEN(str1));
+			break;
+		case 2:
+			printf("
+Enter the string=>");
+			scanf("%s",str1);
+			STRCPY(str2,str1);
+			printf("copied string=>");
+			puts(str2);
+			break;
+		case 3:
+			printf("Enter two string=>");
+			scanf("%s",&str1);
+			scanf("%s",&str2);
+			if(STRCMP(str2,str1))
+				printf("string is equal");
+			else
+				printf("String is not equal");
+			break;
+		case 4:
+			printf("Enter two string=>");
+			scanf("%s",str1);
+			scanf("%s",str2);
+			STRCAT(str3,str2,str1);
+			puts(str3);
+			break;
+		case 5:
+			printf("Enter the string=>");
+			scanf("%s",str1);
+			STRREV(str1);
+			printf("Reverse stringis=>");
+			puts(str1);
+			break;
+		default:
+			goto end;
+	}
+	goto re;
+end:
+getch();
+}
+int STRLEN(char *s)
+{
+	int i=0;
+	while(*s!=NULL)
+	{
+		i++;
+		s++;
+	}
+	return i;
+}
+int STRCPY(char *s2,char *s1)
+{
+	while(*s1!=NULL)
+	{
+		*s2=*s1;
+		s2++;
+		s1++;
+	}
+	*s2=NULL;
+	return 1;
+}
+int STRCMP(char *s2,char *s1)
+{
+	int i=0,len1,len2;
+	len1=strlen(s1);
+	len2=strlen(s2);
+	if(len1==len2)
+	{
+		while(*s2==*s1 && *s2 != NULL && *s1!=NULL)
+		{
+			i++;
+			s1++;
+			s2++;
+		}
+		if(i==len1)
+			return 1;
+		else
+			return 0;
+	}
+	else
+	{
+		return 0;
+	}
+}
+int STRREV(char *s)
+{
+	int len;
+	char *s1;
+	char *ptr;
+	len=strlen(s);
+	s1=(char *)malloc(sizeof(char));
+	strcpy(s1,s);
+	ptr=s1+len-1;
+	while(*s!=NULL)
+	{
+		*s=*ptr;
+		ptr--;
+		s++;
+		s1++;
+	}
+	*s=NULL;
+	return 1;
+}
+int STRCAT(char *s3,char *s2,char *s1)
+{
+	while(*s1!=NULL)
+	{
+		*s3=*s1;
+		s3++;
+		s1++;
+	}
+	s3++;
+	while(*s2!=NULL)
+	{
+		*s3=*s2;
+		s3++;
+		s2++;
+	}
+	*s3=NULL;
+	return 1;
+}