C++: C-Strings - Programming Exercise Solutions - main

Here is a min program. The functions it calls are in another file, and an include file which contains those headers is used. 

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// strings/cstring-array-main.cpp - Example C-string functions using arrays.
// 2003-12-10  Fred Swartz

//============================================ includes
#include <iostream>
#include <cstring>
using namespace std;

#include "cstring-array.h"

//============================================ globals
int testCount = 0;
int testFailures = 0;

//============================================ prototypes
void check(bool passed, char testName[]);

//============================================ main
int main() {
    char s[100];
    char t[100];

    //-- trimRight
    strcpy(s, "How are you?   ");
    trimRight(s);
    check(strcmp(s, "How are you?")==0, "trimRight 1");
    
    strcpy(s, "How are you?");
    trimRight(s);
    check(strcmp(s, "How are you?")==0, "trimRight 2");
    
    strcpy(s, "");
    trimRight(s);
    check(strcmp(s, "")==0, "trimRight 3");
    
    //-- truncate
    strcpy(s, "How are you?");
    truncate(s, 3);
    check(strcmp(s, "How")==0, "truncate 1");
    
    //-- padRight
    strcpy(s, "test");
    padRight(s, 6);
    check(strcmp(s, "test  ")==0, "padRight 1");
    
    strcpy(s, "test");
    padRight(s, 2);
    check(strcmp(s, "test")==0, "padRight 2");
    
    //-- isAlpha
    check( isAlpha("test"), "isAlpha 1");
    check( isAlpha("")    , "isAlpha 2");
    check(!isAlpha("a ")  , "isAlpha 3");
    check(!isAlpha("123") , "isAlpha 4");
    
    //-- count
    check(count("abracadabra", 'a')==5, "count 1");
    check(count("xyz", 'a') == 0      , "count 2");
    check(count("", 'a') == 0         , "count 3");
    

    cout << endl << "Summary: Passed " << testCount-testFailures 
                 << ", Failed " << testFailures << endl;
                 
    char x; cout << "Enter any char to exit."; cin.get(x); // keep window open
    return 0;
}

//============================================ check
void check(bool passed, char testName[]) {
    testCount++;
    if (passed) {
        cout << "Passed " << testName << endl;
    } else {
        cout << "FAILED " << testName << endl;
        testFailures++;
    }
}