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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4.  
  5. int i,j,k;
  6. for(i = 1;i <= 9;i+=3)
  7. for(j = 1;j <= 9;j++,printf("\n"))
  8. for(k=i;k < i+3;k++)
  9. printf("%2dx%2d=%2d ",k,j,k*j);
  10.  
  11.  
  12. return 0;
  13. }
  14.  
Success #stdin #stdout 0s 9424KB
stdin
Standard input is empty
stdout
 1x 1= 1  2x 1= 2  3x 1= 3 
 1x 2= 2  2x 2= 4  3x 2= 6 
 1x 3= 3  2x 3= 6  3x 3= 9 
 1x 4= 4  2x 4= 8  3x 4=12 
 1x 5= 5  2x 5=10  3x 5=15 
 1x 6= 6  2x 6=12  3x 6=18 
 1x 7= 7  2x 7=14  3x 7=21 
 1x 8= 8  2x 8=16  3x 8=24 
 1x 9= 9  2x 9=18  3x 9=27 
 4x 1= 4  5x 1= 5  6x 1= 6 
 4x 2= 8  5x 2=10  6x 2=12 
 4x 3=12  5x 3=15  6x 3=18 
 4x 4=16  5x 4=20  6x 4=24 
 4x 5=20  5x 5=25  6x 5=30 
 4x 6=24  5x 6=30  6x 6=36 
 4x 7=28  5x 7=35  6x 7=42 
 4x 8=32  5x 8=40  6x 8=48 
 4x 9=36  5x 9=45  6x 9=54 
 7x 1= 7  8x 1= 8  9x 1= 9 
 7x 2=14  8x 2=16  9x 2=18 
 7x 3=21  8x 3=24  9x 3=27 
 7x 4=28  8x 4=32  9x 4=36 
 7x 5=35  8x 5=40  9x 5=45 
 7x 6=42  8x 6=48  9x 6=54 
 7x 7=49  8x 7=56  9x 7=63 
 7x 8=56  8x 8=64  9x 8=72 
 7x 9=63  8x 9=72  9x 9=81