西安交通大学915-2020-编程2

#include <stdio.h>
#include <stdlib.h>
#include <string.h>


void swap(char*s, int i, int j) {
    char c = s[i];
    s[i] = s[j];
    s[j] = c;
}
void reverse(char* s, int i, int j) {
    while (i < j) {
        swap(s, i++, j--);
    }
}

int main() {
    int a = 0;
    int b = 0;
    int n = 0;
    printf("please input n(n >0 && n <= 10000):\n");
    scanf("%d", &n);
    while (n--) {
        printf("please input a and b:\n");
        scanf("%d%d", &a, &b);
        char x[128] = {0};
        char y[128] = {0};
        char z[128] = {0};
        int sum = a + b;
        itoa(a, x, 10);
        itoa(b, y, 10);
        itoa(sum, z, 10);
        int lenx = strlen(x);
        int leny = strlen(y);
        int lenz = strlen(z);
        reverse(x, 0, lenx - 1);
        reverse(y, 0, leny - 1);
        reverse(z, 0, lenz - 1);
        int ra = atoi(x);
        int rb = atoi(y);
        int rsum = atoi(z);
        if (ra + rb == rsum) {
            printf("%d + %d = %d\n", a, b, sum);
        } else {
            printf("none\n");
        }
    }
    return 0;
}