Commit46bf021

committed

atoi

1 parent64f46bd commit46bf021Copy full SHA for 46bf021

File tree

+45

-0

lines changed

+45

-0

lines changed

Lines changed: 45 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,45 @@`
	`1`	`+packageAlgorithms.string;`
	`2`	`+`
	`3`	`+publicclassAtoi {`
	`4`	`+publicintatoi(Stringstr) {`
	`5`	`+if (str ==null) {`
	`6`	`+return0;`
	`7`	`+ }`
	`8`	`+`
	`9`	`+// remove the spaces in the beginning and the end.`
	`10`	`+Strings =str.trim();`
	`11`	`+`
	`12`	`+booleanminus =false;`
	`13`	`+longnum =0;`
	`14`	`+for (inti =0;i <s.length();i++) {`
	`15`	`+/*`
	`16`	`+ takes an optional initial plus or minus sign followed by as many numerical digits as possible, and interprets them as a numerical value.`
	`17`	`+ */`
	`18`	`+if (i ==0 &&s.charAt(i) =='+') {`
	`19`	`+continue;`
	`20`	`+ }elseif (i ==0 &&s.charAt(i) =='-'){`
	`21`	`+// get the`
	`22`	`+minus =true;`
	`23`	`+continue;`
	`24`	`+ }`
	`25`	`+`
	`26`	`+intc =s.charAt(i) -'0';`
	`27`	`+if (c >9 \|\|c <0) {`
	`28`	`+// invalid character.`
	`29`	`+break;`
	`30`	`+ }`
	`31`	`+`
	`32`	`+num =num *10 +c;`
	`33`	`+ }`
	`34`	`+`
	`35`	`+// If the correct value is out of the range of representable values, INT_MAX (2147483647) or INT_MIN (-2147483648) is // returned.`
	`36`	`+if (minus) {`
	`37`	`+num = -num;`
	`38`	`+num =Math.max(num,Integer.MIN_VALUE);`
	`39`	`+ }else {`
	`40`	`+num =Math.min(num,Integer.MAX_VALUE);`
	`41`	`+ }`
	`42`	`+`
	`43`	`+return (int)num;`
	`44`	`+ }`
	`45`	`+}`

Comments

(0)