Cannot return values of char variable

Hi there once more........

Instead of showing all the code my problem is simple.

I've tried to create this function:

char temp(char *string){

alterString(string);
return string;
}

char alterString(char *string){}

temp receives a string and uses the alterString to modify it.

My issue is simple, when i pass the argument string to alterString it
appears in the function alterString has being empty.

I've tried changing the signatures of the functions to
char temp(char string){
char alterString(char string){}


but the issue still occurs......


Can please somebody give me just a little example of the working
function.......... it would really help.....

thanks in advance for every support you have given to me this night.

.

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