string_utils.c Program Help

Hello, I am writing a program to help demostrate the many functions strings can perform in C language. I currently have this code below but have one problem while compiling...

//String Utilities BY **

//Made 03-22-2017

#include #include #include #include

void removeBlanks(char *src, char *dest); void replaceChar(char *src, char oldChar, char newChar); char *flipCase(const char *src);

int main(){

char src[100]="default",choice='q',oldChar='q',newChar='q';

printf("Enter the input string: "); fgets(src, 100, stdin);

printf(" 1: Remove Blanks 2: Replace Character 3: FlipCase "); printf(" Enter the choice: "); scanf("%c",&choice);

switch(choice){

case '1':

removeBlanks(src,dest); ----THIS LINE HERE IS LEFT WITH AN ERROR MESSAGE break;

case '2':

printf(" Enter character to replace: "); scanf(" %c", &oldChar);

printf(" Enter replacement character: "); scanf(" %c", &newChar);

replaceChar(src,oldChar,newChar); break;

case '3':

flipCase(src); break;

default: printf(" Wrong choice!! "); break;

} return (1); }

void removeBlanks(char *src, char *dest){ int size = strlen(src); int i,j = 0; for(i = 0; i < size; i++){ if(!isspace(src[i])){ dest[j] = src[i]; j++; } } }

void replaceChar(char *src, char oldChar, char newChar){

char temp[1000]; int j=0,i=0; for(i=0;src[i]!='\0';i++){

if(src[i]!= oldChar) temp[j++]=src[i]; else{ temp[j++]= newChar; } }

temp[j]='\0'; printf("String after replacing %c by %c in %s Is: %s",oldChar,newChar,src,temp);

}

char *flipCase(const char *src){

char *output; output = malloc(strlen(src) + 1);

strcpy(output,src);

int i = 0;

while(output[i] != '\0'){

if(isalpha(src[i])){ if (isupper(src[i])){ output[i]= tolower(src[i]); i++; } else{ if (islower(src[i])){ output[i]=toupper(src[i]); i++; } } } else i++; }

printf(" The original string was: %s The Flipped Case string is: %s", src, output); }

The error message declares that "dest" has no reference as it has not been used before. The functions must remain the same for me to recieve credit.

The program takes a string and can perform one of three tasks:

1) Remove spaces

2) Switch a character

3) Flip case

Thank you very much.