c-gcc, 107 bytes

Result

AC

Duration

1024ms

Code [DL]

main(i,j,a,b){scanf("%d%d",&a,&b);for(i=a;i--;)for(j=b;j--;)printf(i*j*(a-i-1)*(b-j-1)?" ":(j?"*":"*\n"));}

stdin

27
62

stdout

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stderr

/tmp/code.c:1:1: warning: return type defaults to 'int' [-Wimplicit-int]
 main(i,j,a,b){scanf("%d%d",&a,&b);for(i=a;i--;)for(j=b;j--;)printf(i*j*(a-i-1)*(b-j-1)?" ":(j?"*":"*\n"));}
 ^~~~
/tmp/code.c: In function 'main':
/tmp/code.c:1:1: warning: type of 'i' defaults to 'int' [-Wimplicit-int]
/tmp/code.c:1:1: warning: type of 'j' defaults to 'int' [-Wimplicit-int]
/tmp/code.c:1:1: warning: type of 'a' defaults to 'int' [-Wimplicit-int]
/tmp/code.c:1:1: warning: type of 'b' defaults to 'int' [-Wimplicit-int]
/tmp/code.c:1:15: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
 main(i,j,a,b){scanf("%d%d",&a,&b);for(i=a;i--;)for(j=b;j--;)printf(i*j*(a-i-1)*(b-j-1)?" ":(j?"*":"*\n"));}
               ^~~~~
/tmp/code.c:1:15: warning: incompatible implicit declaration of built-in function 'scanf'
/tmp/code.c:1:15: note: include '<stdio.h>' or provide a declaration of 'scanf'
+#include <stdio.h>
 main(i,j,a,b){scanf("%d%d",&a,&b);for(i=a;i--;)for(j=b;j--;)printf(i*j*(a-i-1)*(b-j-1)?" ":(j?"*":"*\n"));}
               ^~~~~
/tmp/code.c:1:61: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
 main(i,j,a,b){scanf("%d%d",&a,&b);for(i=a;i--;)for(j=b;j--;)printf(i*j*(a-i-1)*(b-j-1)?" ":(j?"*":"*\n"));}
                                                             ^~~~~~
/tmp/code.c:1:61: warning: incompatible implicit declaration of built-in function 'printf'
/tmp/code.c:1:61: note: include '<stdio.h>' or provide a declaration of 'printf'
/tmp/code.c:1:79: warning: '*' in boolean context, suggest '&&' instead [-Wint-in-bool-context]
 main(i,j,a,b){scanf("%d%d",&a,&b);for(i=a;i--;)for(j=b;j--;)printf(i*j*(a-i-1)*(b-j-1)?" ":(j?"*":"*\n"));}
                                                                    ~~~~~~~~~~~^~~~~~~~