View difference between Paste ID: uQkCQGhz and NR7G09dA

 // NOTE: compile with g++ filename.cpp -std=c++11
 //    also, if this doesn't work for you, try the alternate char-based version
 
 #include <iostream>
 #include <cmath>
 #define DIM 1024
 #define DM1 (DIM-1)
 #define _sq(x) ((x)*(x))                           // square
 #define _cb(x) abs((x)*(x)*(x))                    // absolute value of cube
 #define _cr(x) (unsigned short)(pow((x),1.0/3.0))  // cube root
 
-unsigned short green_fn(int,int);
+unsigned short GR(int,int);
-unsigned short blue_fn(int,int);
+unsigned short BL(int,int);
 
-unsigned short red_fn(int i,int j){
+unsigned short RD(int i,int j){
     // YOUR CODE HERE
 }
-unsigned short green_fn(int i,int j){
+unsigned short GR(int i,int j){
     // YOUR CODE HERE
 }
-unsigned short blue_fn(int i,int j){
+unsigned short BL(int i,int j){
     // YOUR CODE HERE
 }
 
 void pixel_write(int,int);
 FILE *fp;
 int main(){
     fp = fopen("MathPic","wb");
     fprintf(fp, "P6\n%d %d\n1023\n", DIM, DIM);
     for(int j=0;j<DIM;j++)
         for(int i=0;i<DIM;i++)
             pixel_write(i,j);
     fclose(fp);
     return 0;
 }
 void pixel_write(int i, int j){
     static unsigned short color[3];
-    color[0] =   red_fn(i,j)&DM1;
+    color[0] = RD(i,j)&DM1;
-    color[1] = green_fn(i,j)&DM1;
+    color[1] = GR(i,j)&DM1;
-    color[2] =  blue_fn(i,j)&DM1;
+    color[2] = BL(i,j)&DM1;
     fwrite(color, 2, 3, fp);
 }