Problems with pointers

[Poincare]

I am trying to write a math engine. So far, I'm still working on the addition portion of the code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void whatOperation(void);
void add(char[], char[]);
int main (void) {
	printf("Welcome to the NumberChopper!\n\n\n\n");
	whatOperation();
	return 0;
}

//find out which function to execute
void whatOperation(void) {
		char functionRead[1000];
		char addFunction[1000]=" add";
		
		printf("Please enter the function with parameters: ");
		scanf("%s", &functionRead);
		if(strncmp(functionRead, addFunction, 4)==1) {
			add(functionRead, addFunction);
		}
		else {
			printf("Hey you! Don't fall asleep at the keyboard! \n");
			printf("%s", addFunction);
		}
}

//add function
int countCharacters(char functionRead) {
	int charactersInInput=0;
	while(functionRead[charactersInInput]!="\n") {
		charactersInInput++;
	}
	return charactersInInput++;
	
}
void add (char functionRead[], char addFunction[]) {
	printf("Add function successfully acessed.\n");
	
	//Pointers
	char *functionReadPtr=functionRead+7;
	int charactersInInput=0;
	char *testPointer = functionRead;
	char integers[1000];
	
	printf("Test pointer: %s \n", testPointer);
	printf("Parameter pointer: %s \n", functionReadPtr );
	
	
	
	
	
	
}

When I build it with CodeLite I get:

C:/Documents and Settings/Dhaivat Pandya/Desktop/helloWorld.c/NumberChopper/NumberChopper.c: In function `countCharacters':
C:/Documents and Settings/Dhaivat Pandya/Desktop/helloWorld.c/NumberChopper/NumberChopper.c:32: error: subscripted value is neither array nor pointer
mingw32-make.exe[1]: *** [Debug/NumberChopper.o] Error 1
mingw32-make.exe: *** [All] Error 2
----------Build Ended----------
1 errors, 0 warnings

I don't understand the problem

[Wraithan]

int countCharacters(char functionRead)

It seems you are not passing an array or pointer to the function. Instead it is just a char.

[BEN10]

I am trying to write a math engine. So far, I'm still working on the addition portion of the code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void whatOperation(void);
void add(char[], char[]);
int main (void) {
	printf("Welcome to the NumberChopper!\n\n\n\n");
	whatOperation();
	return 0;
}

//find out which function to execute
void whatOperation(void) {
		char functionRead[1000];
		char addFunction[1000]=" add";
		
		printf("Please enter the function with parameters: ");
		scanf("%s", &functionRead);
		if(strncmp(functionRead, addFunction, 4)==1) {
			add(functionRead, addFunction);
		}
		else {
			printf("Hey you! Don't fall asleep at the keyboard! \n");
			printf("%s", addFunction);
		}
}

//add function
int countCharacters(char functionRead) {
	int charactersInInput=0;
	while(functionRead[charactersInInput]!="\n") {
		charactersInInput++;
	}
	return charactersInInput++;
	
}
void add (char functionRead[], char addFunction[]) {
	printf("Add function successfully acessed.\n");
	
	//Pointers
	char *functionReadPtr=functionRead+7;
	int charactersInInput=0;
	char *testPointer = functionRead;
	char integers[1000];
	
	printf("Test pointer: %s \n", testPointer);
	printf("Parameter pointer: %s \n", functionReadPtr );
	
	
	
	
	
	
}

When I build it with CodeLite I get:

C:/Documents and Settings/Dhaivat Pandya/Desktop/helloWorld.c/NumberChopper/NumberChopper.c: In function `countCharacters':
C:/Documents and Settings/Dhaivat Pandya/Desktop/helloWorld.c/NumberChopper/NumberChopper.c:32: error: subscripted value is neither array nor pointer
mingw32-make.exe[1]: *** [Debug/NumberChopper.o] Error 1
mingw32-make.exe: *** [All] Error 2
----------Build Ended----------
1 errors, 0 warnings

I don't understand the problem

i think '&' should be removed from the red portion.coz while inputting a string using scanf '&' is not used. correct me if i'm wrong.

[c.user]

    if(strncmp(functionRead, addFunction, 4)==1) {

use > 0 for check, because it is not guaranteed by the standard, that it will be only 1

about your problem

int countCharacters(char functionRead) {

it is an array, it must be char functionRead[] or char *functionRead
Oh, it was said