Language: C

#include <stdio.h>
  
int  main(void){
         int h,w,i,j;
          while(1){
          scanf("%d %d",&h,&w);
           if( h==0 && w==0)
              break;
           for(i=1; i<=h; i++){
            for(j=1; j<=w; j++){
              if((i+j)%2 == 0)
              printf("#");
             else
              printf(".");
             }printf("\n");
            }printf("\n");
           }
            return 0;
}


Compiler output:
main.c:2:1: error: stray '\302' in program
    2 | <U+00A0><U+00A0>
      | ^~~~~~~~
main.c:2:2: error: stray '\302' in program
    2 | <U+00A0><U+00A0>
      |         ^~~~~~~~
main.c:3:4: error: stray '\302' in program
    3 | int<U+00A0> main(void){
      |    ^~~~~~~~
main.c: In function 'main':
main.c:4:1: error: stray '\302' in program
    4 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>int h,w,i,j;
      | ^~~~~~~~
main.c:4:2: error: stray '\302' in program
    4 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>int h,w,i,j;
      |         ^~~~~~~~
main.c:4:3: error: stray '\302' in program
    4 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>int h,w,i,j;
      |                 ^~~~~~~~
main.c:4:4: error: stray '\302' in program
    4 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>int h,w,i,j;
      |                         ^~~~~~~~
main.c:4:5: error: stray '\302' in program
    4 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>int h,w,i,j;
      |                                 ^~~~~~~~
main.c:4:6: error: stray '\302' in program
    4 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>int h,w,i,j;
      |                                         ^~~~~~~~
main.c:4:7: error: stray '\302' in program
    4 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>int h,w,i,j;
      |                                                 ^~~~~~~~
main.c:4:8: error: stray '\302' in program
    4 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>int h,w,i,j;
      |                                                         ^~~~~~~~
main.c:4:9: error: stray '\302' in program
    4 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>int h,w,i,j;
      |                                                                 ^~~~~~~~
main.c:5:1: error: stray '\302' in program
    5 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>while(1){
      | ^~~~~~~~
main.c:5:2: error: stray '\302' in program
    5 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>while(1){
      |         ^~~~~~~~
main.c:5:3: error: stray '\302' in program
    5 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>while(1){
      |                 ^~~~~~~~
main.c:5:4: error: stray '\302' in program
    5 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>while(1){
      |                         ^~~~~~~~
main.c:5:5: error: stray '\302' in program
    5 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>while(1){
      |                                 ^~~~~~~~
main.c:5:6: error: stray '\302' in program
    5 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>while(1){
      |                                         ^~~~~~~~
main.c:5:7: error: stray '\302' in program
    5 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>while(1){
      |                                                 ^~~~~~~~
main.c:5:8: error: stray '\302' in program
    5 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>while(1){
      |                                                         ^~~~~~~~
main.c:5:9: error: stray '\302' in program
    5 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>while(1){
      |                                                                 ^~~~~~~~
main.c:5:10: error: stray '\302' in program
    5 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>while(1){
      |                                                                         ^~~~~~~~
main.c:6:1: error: stray '\302' in program
    6 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>scanf("%d %d",&h,&w);
      | ^~~~~~~~
main.c:6:2: error: stray '\302' in program
    6 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>scanf("%d %d",&h,&w);
      |         ^~~~~~~~
main.c:6:3: error: stray '\302' in program
    6 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>scanf("%d %d",&h,&w);
      |                 ^~~~~~~~
main.c:6:4: error: stray '\302' in program
    6 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>scanf("%d %d",&h,&w);
      |                         ^~~~~~~~
main.c:6:5: error: stray '\302' in program
    6 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>scanf("%d %d",&h,&w);
      |                                 ^~~~~~~~
main.c:6:6: error: stray '\302' in program
    6 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>scanf("%d %d",&h,&w);
      |                                         ^~~~~~~~
main.c:6:7: error: stray '\302' in program
    6 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>scanf("%d %d",&h,&w);
      |                                                 ^~~~~~~~
main.c:6:8: error: stray '\302' in program
    6 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>scanf("%d %d",&h,&w);
      |                                                         ^~~~~~~~
main.c:6:9: error: stray '\302' in program
    6 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>scanf("%d %d",&h,&w);
      |                                                                 ^~~~~~~~
main.c:6:10: error: stray '\302' in program
    6 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>scanf("%d %d",&h,&w);
      |                                                                         ^~~~~~~~
main.c:7:1: error: stray '\302' in program
    7 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>if( h==0 && w==0)
      | ^~~~~~~~
main.c:7:2: error: stray '\302' in program
    7 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>if( h==0 && w==0)
      |         ^~~~~~~~
main.c:7:3: error: stray '\302' in program
    7 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>if( h==0 && w==0)
      |                 ^~~~~~~~
main.c:7:4: error: stray '\302' in program
    7 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>if( h==0 && w==0)
      |                         ^~~~~~~~
main.c:7:5: error: stray '\302' in program
    7 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>if( h==0 && w==0)
      |                                 ^~~~~~~~
main.c:7:6: error: stray '\302' in program
    7 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>if( h==0 && w==0)
      |                                         ^~~~~~~~
main.c:7:7: error: stray '\302' in program
    7 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>if( h==0 && w==0)
      |                                                 ^~~~~~~~
main.c:7:8: error: stray '\302' in program
    7 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>if( h==0 && w==0)
      |                                                         ^~~~~~~~
main.c:7:9: error: stray '\302' in program
    7 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>if( h==0 && w==0)
      |                                                                 ^~~~~~~~
main.c:7:10: error: stray '\302' in program
    7 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>if( h==0 && w==0)
      |                                                                         ^~~~~~~~
main.c:7:11: error: stray '\302' in program
    7 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>if( h==0 && w==0)
      |                                                                                 ^~~~~~~~
main.c:8:1: error: stray '\302' in program
    8 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>break;
      | ^~~~~~~~
main.c:8:2: error: stray '\302' in program
    8 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>break;
      |         ^~~~~~~~
main.c:8:3: error: stray '\302' in program
    8 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>break;
      |                 ^~~~~~~~
main.c:8:4: error: stray '\302' in program
    8 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>break;
      |                         ^~~~~~~~
main.c:8:5: error: stray '\302' in program
    8 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>break;
      |                                 ^~~~~~~~
main.c:8:6: error: stray '\302' in program
    8 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>break;
      |                                         ^~~~~~~~
main.c:8:7: error: stray '\302' in program
    8 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>break;
      |                                                 ^~~~~~~~
main.c:8:8: error: stray '\302' in program
    8 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>break;
      |                                                         ^~~~~~~~
main.c:8:9: error: stray '\302' in program
    8 | <U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0><U+00A0>break;
      |