The scatter method takes the original image and scatter its pixels. The program works well when I use several lines of code instead of the method "randomSelect". The program seems to go into an infinite loop and the image does not change when I use the method "randomSelect".
void scatter(GBufferedImage &img, Grid<int> original, int row, int col) {
int degree;
while (true) {
degree = getInteger("Enter degree of scatter [1-100]: ");
if (degree >=1 && degree <= 100) break;
}
Grid<int> newImg(row, col);
for (int i = 0; i < row; i++) {
for (int j = 0; j < col; j++) {
/* int newRow = -1;
int newCol = -1;
while (!original.inBounds(newRow, newCol)) {
newRow = randomInteger(max(i - degree, 0), min(i + degree,original.numRows()));
newCol = randomInteger(max(j - degree, 0), min(j + degree,original.numRows()));
}
newImg[i][j] = original[newRow][newCol]; */ // work properly
newImg[i][j] = randomSelect(original, i , j, degree); // do not work
}
}
img.fromGrid(newImg);
}
int randomSelect(Grid<int> original, int i, int j, int degree) { // do not work
int newRow = -1;
int newCol = -1;
while (!original.inBounds(newRow, newCol)) {
newRow = randomInteger(max(i - degree, 0), min(i + degree,original.numRows()));
newCol = randomInteger(max(j - degree, 0), min(j + degree,original.numRows()));
}
return original[newRow][newCol];
}
最佳答案
您应该传递原件作为引用:
int randomSelect(Grid<int>& original, int i, int j, int degree) { // will work
关于c++ - 为什么我用 "randomSelect"方法替换几行代码后程序无法运行，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38304500/