Operator Precedence
Operator Description Result Associativity -------------------------------------------------------------------- () Grouping exp N/A -------------------------------------------------------------------- () Function call rexp L-R [] Subscript lexp L-R . Structure member lexp L-R -> Structure pointer member lexp L-R ++ Postfix increment rexp L-R -- Postfix decrement rexp L-R -------------------------------------------------------------------- ! Logical negate rexp R-L ~ One's complement rexp R-L + Unary plus rexp R-L - Unary minus rexp R-L ++ Prefix increment rexp R-L -- Prefix decrement rexp R-L * Indirection (dereference) lexp R-L & Address of rexp R-L sizeof Size in bytes rexp R-L -------------------------------------------------------------------- (type) Type conversion (cast) rexp R-L -------------------------------------------------------------------- * Multiplication rexp L-R / Division rexp L-R % Integer remainder (modulo) rexp L-R -------------------------------------------------------------------- + Addition rexp L-R - Subtraction rexp L-R -------------------------------------------------------------------- << Left shift rexp L-R >> Right shift rexp L-R -------------------------------------------------------------------- > Greater than rexp L-R >= Greater than or equal rexp L-R < Less than rexp L-R <= Less than or equal rexp L-R -------------------------------------------------------------------- == Equal to rexp L-R != Not equal to rexp L-R -------------------------------------------------------------------- & Bitwise AND rexp L-R -------------------------------------------------------------------- ^ Bitwise exclusive OR rexp L-R -------------------------------------------------------------------- | Bitwise inclusive OR rexp L-R -------------------------------------------------------------------- && Logical AND rexp L-R -------------------------------------------------------------------- || Logical OR rexp L-R -------------------------------------------------------------------- ?: Conditional rexp N/A -------------------------------------------------------------------- = Assignment rexp R-L += Add to rexp R-L -= Subtract from rexp R-L *= Multiply by rexp R-L /= Divide by rexp R-L %= Modulo by rexp R-L <<= Shift left by rexp R-L >>= Shift right by rexp R-L &= AND with rexp R-L ^= Exclusive OR with rexp R-L |= Inclusive OR with rexp R-L -------------------------------------------------------------------- , Comma rexp L-R --------------------------------------------------------------------
ASCII Characters
Common non-printing control characters
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0 NUL
7 Bell
8 Backspace
9 Tab
10 Line feed
13 Carriage return
26 End of file (Ctrl-Z)
27 [Esc] (Escape key)
ASCII characters (only 32-127 are standard)
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32 64 @ 96 ` 128 160 192 + 224
33 ! 65 A 97 a 129 161 193 - 225
34 " 66 B 98 b 130 162 194 - 226 A
35 # 67 C 99 c 131 163 195 + 227 d
36 $ 68 D 100 d 132 164 196 - 228 O
37 % 69 E 101 e 133 165 197 + 229
38 & 70 F 102 f 134 166 198 230
39 ' 71 G 103 g 135 167 199 231
40 ( 72 H 104 h 136 168 200 + 232
41 ) 73 I 105 i 137 169 201 + 233 E
42 * 74 J 106 j 138 170 202 - 234 U
43 + 75 K 107 k 139 171 203 - 235
44 , 76 L 108 l 140 172 204 236 8
45 - 77 M 109 m 141 173 205 - 237
46 . 78 N 110 n 142 174 206 + 238
47 / 79 O 111 o 143 175 207 - 239 n
48 0 80 P 112 p 144 176 208 - 240 =
49 1 81 Q 113 q 145 177 209 - 241
50 2 82 R 114 r 146 178 210 - 242 =
51 3 83 S 115 s 147 179 211 + 243 =
52 4 84 T 116 t 148 180 212 + 244 (
53 5 85 U 117 u 149 181 213 + 245 )
54 6 86 V 118 v 150 182 214 + 246
55 7 87 W 119 w 151 183 + 215 + 247 ~
56 8 88 X 120 x 152 184 + 216 + 248
57 9 89 Y 121 y 153 185 217 + 249
58 : 90 Z 122 z 154 186 218 + 250
59 ; 91 [ 123 { 155 187 + 219 251 v
60 < 92 \ 124 | 156 188 + 220 _ 252 n
61 = 93 ] 125 } 157 189 + 221 253
62 > 94 ^ 126 ~ 158 P 190 + 222 254
63 ? 95 _ 127 159 191 + 223 _ 255
Common printf formatting codes
%c - characters %s - strings (NUL-terminated C strings) %d - integers %i - integers %f - floating point %g - floating point (minimum digits) %p - pointers (displays in hex) %x - hexidecimal integers %u - unsigned %ld, %li - long integers %lu - unsigned long integers