题解 | #数字颠倒#

#import <Foundation/Foundation.h>

int main(int argc, char* argv[]) {
    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
    
    char inputNumber[10000000];
    if (scanf("%s", inputNumber) != EOF) {
        // printf("%s", inputNumber);
    }

    // 倒序存入数组中
    NSMutableArray *reverseArray = [NSMutableArray array];
    NSUInteger length = strlen(inputNumber);
    for (int i = length - 1; i >= 0; i--) {
        [reverseArray addObject:[NSString stringWithFormat:@"%c", inputNumber[i]]];
    }
    // 打印
    for (int j = 0; j < length; j++) {
        printf("%@", [reverseArray objectAtIndex:j]);
    }

    [pool drain];
    return 0;
}