`+`

[AmmarHaddadi]

+ (Plus flag)

• Works with: d i
• Description: Forces plus sign for positive numbers
• Example:

  printf("%+d\n", 42);    // "+42"
  printf("%+d\n", -42);   // "-42"

Note:

• They should work in combination with width/precision

Example test cases:

printf("|%#10x|\n", 42);     // |    0x2a2a|
printf("|%+10d|\n", 42);     // |       +42|
printf("| %10d|\n", 42);     // |        42|

[AmmarHaddadi]

no need to hack into itoa(), just check if it returns a string that doesn't start with - and print +