打印杨辉三角

#include <stdio.h>

int main(int argc, const char * argv[]) {
    
    int a[6][6] = {0};
    for (int i = 0; i < 6; i++) {
        a[i][0] = 1;
        a[i][i] = 1;
    }
    for (int i = 0; i < 5; i++) {
        for (int j = 0 ;j < 5 ; j++) {
            a[i+1][j+1] = a[i][j] + a[i][j+1];
        }
    }
    for (int i = 0; i < 6; i++) {
        for (int j = 0; j <= i; j++) {
            printf("%i\t",a[i][j]);
        }
        printf("\n");
    }
    return 0;
}