Error C2106 Left Operand Must Be L Value
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Error C2181 Illegal Else Without Matching If
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Left Operand Must Be L-value In C
vote 1 down vote favorite am trying to understand how link lists work ; and on changing example code from tutor I get the 'left operand must be l-value' error ...here is my code. Any help appreciated :) struct node { char name[20]; struct node *next; }; /*Function to allocate memory and initialize node - returns pointer to node*/ struct node*mknode(char *str) { struct node *np; np left operand must be l-value c++ = (struct node*)malloc(sizeof(struct node)); if(np) { np->name = *str; np->next = NULL; /*sets the 'next' pointer to last list item to NULL*/ } return np; } int main(void) { int i,menu,k=1,number; char name[20]; char *str = name; struct node* n; struct node *head=NULL; printf("Link Lists\n 1-Enter Data into lists\n 2-Display All List Items\n 3-Quit Program :(\n"); do { printf("\nPlease choose an option: "); scanf("%d",&menu); switch (menu) { case 1: printf("\nPlease Enter A Number:"); scanf("%d",&name); n=mknode(str); /*create new node with i as data*/ append_node(&head,n); /*add new node to end of list*/ break; this is where i get the error np->name = *str; after changing the structures data type from integer to char thanks c share|improve this question asked Mar 7 '13 at 21:22 Dex Dave 651211 You're treating np->name as a pointer, when it's an array. You can't assign something to an array. –teppic Mar 7 '13 at 21:25 You can't assign directly to a character array, you need to use strcpy or strncpy –Hunter McMillen Mar 7 '13 at 21:25 possible duplicate of error C2106: '=' : left operand must be l-value in C –Bo Persson Mar 7 '13 at 21:29 thanks fo
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Left Operand Must Be L Value Struct
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C++ Must Be A Modifiable Lvalue
Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only must be lvalue javascript takes a minute: Sign up Error parsing string in C “ left operand must be l-value” up vote 3 down vote favorite 1 I am faced with the need to pull out the information in a string of the format http://stackoverflow.com/questions/15282003/left-operand-must-be-l-value-c-programing "blah.bleh.bloh" in ANSI C. Normally I would use strok() to accomplish this, but since I am getting this string via strtok, and strtok is not thread-safe, I cannot use this option. I have written a function to manually parse the string. Here is a snippit: for(charIndex=0; charIndex < (char)strlen(theString); charIndex++) { if(theString[charIndex] == '.') { theString[charIndex] = '\0'; osi_string_copy_n(Info[currentInfoIndex], 1024, theString, charIndex + 1 ); currentInfoIndex++; theString = &theString[charIndex + 1]; } charIndex++; } As you can see, I try to http://stackoverflow.com/questions/489933/error-parsing-string-in-c-left-operand-must-be-l-value find the first occurrence of '.' and make note of the index of the character. Then I convert the '.' to a null char and copy the first string to an array. Then I want to change the pointer to start just after where the delimiter was found, essentially giving me a new shorter string. Unfortunately I am getting an error on the line: theString = &theString[charIndex + 1]; The error is: error C2106: '=' : left operand must be l-value Why am I not allowed to move the pointer like this? Is my method flawed? Perhaps someone has a better idea for me to parse this string. EDIT: In response to the comments, the declaration for theString is: char theString[1024] = {0}; Also, I am guaranteed that theString will never be more than 1024 characters. c string share|improve this question edited Jan 29 '09 at 14:15 asked Jan 28 '09 at 23:48 Tim 88842035 Let us know how theString is declared. –Michael Burr Jan 28 '09 at 23:53 You should also take a look at some of the other string functions, like strspn and strcspn. –MSN Jan 29 '09 at 0:09 Unrelated, but why "(char)strlen(theString)"? Do you want this function to be unable to deal with strings longer than 128 characters? –Andrew Medico Jan 29 '09 at 0:30 add a comment| 7 Answers 7 active oldest votes up vote 8 down vote accepted Under
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