C/C++ :: Why Does Printf Not Print After A While Or For Loop

I would like the following code to print: "Why doesn't this print?" and "I would like to print the sum of nc: 5". What am I doing wrong.

#include <stdio.h>  
//Use to test ideas and formats//  
main() {
    int c, nc;      
    nc = 0;  

[code]....

My result as compiled by gcc -o testing testing.c

This prints.

test
t1,e2,s3,t4,
5,

I have not figured out how to sum and print as the above code indicates, which complicates my ability to do many of the exercises in "The C Programming Language". I am using a MacBook gcc compiler and X code as well. I cannot get the last two printf functions to work. I did the temperature example with "while (fahr <= upper)" and the printf printed.