有3个整数a, b, c，由键盘输入，输出其中最大的数

有3个整数a, b, c，由键盘输入，输出其中最大的数

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解题思路： 每个数字两两与剩余两个数字进行比较，若比剩下的两个数大则最大，例如：a>b && a>c则a是最大的

答案：

#include <stdio.h>
int main()
{
    int a, b, c;
    scanf("%d %d %d", &a, &b, &c);
    if (a == b && a == c) {
        printf("Three numbers are equal\n");
    }else if (a == b && a > c) {
        printf("a and b are the largest number\n", a); 
    }else if (a == c && a > b) {
        printf("a and c are the largest number\n", a); 
    }else if (b == c && b > a) {
        printf("c and b are the largest number\n", a); 
    }else if (a > b && a > c) {
        printf("a=%d is the largest number\n", a); 
    }else if (b > a && b > c) {
        printf("b=%d is the largest number\n", b); 
    }else {
        printf("c=%d is the largest number\n", c); 
    }   
    return 0;
}