// new image // #include "ppm.h" int main( void) { ppm a = ppm_new(500,500); for( int i = 0; i < a.rows; ++i) for( int j = 0; j < a.cols; ++j) { a.r[i][j] = i+j; a.g[i][j] = 10*i + j; a.b[i][j] = 23; } ppm_write( a); return 0; }