c - 我怎样才能再次这样做？在C中

Question

#define G 10
int main(){
int grid[G][G],c,x;
for(c=1;c<=5;c++){
    for(x=1;x<=5;x++){
        if(c+x<=5)
            grid[c][x]=+1;
        else if(c+x>=7)
            grid[c][x]=-1;
        else
            grid[c][x]=0;

        printf("%2d\t ",grid[c][x]);
    }
    printf("\n");
}
getch();
return 0;
}

它的输出是 这是我真正想做的，但现在我需要让它看起来像

现在我不知道该怎么做，现在很伤我的头

Answer 1

我会这样做

for(c=0; c<5; c++) {     /* arrays start at 0, not 1. */
  for(x=0; x<5; x++) {   /* arrays start at 0, not 1. */
    if (c == x) {        /* looking at your output, the 0's occur when c == x */
      grid[c][x] = 0;
    } else if (c > x) {  /* the -1 when c > x */
      grid[c][x] = -1;
    } else {             /* obviously c > x */
      grid[c][x] = 1;
    }
    /* nothing else changed */
    printf("%2d\t ",grid[c][x]);
  }
  printf("\n");
}