プログラマ専用SNS ミクプラ

コード:

#include<stdio.h>
int shori(int n)
{
	int m=0;
	if (n>0){
	    while(n>0){
		m=m*10+n%10;
		n/=10;
	    }
	}
	return(m);
}
int main(void)
{
	int n,m,k,i;
	for(n=100;n<=199;n++){
		k=0;
		printf("%d\n",n);
		m=shori(n);
		while(n!=m){
			n=n+m;
			k++;
			printf("%d\n",n);
			if(k==50)break;
			m=shori(n);
		}
		if(n==m){
			printf("\n");
		}
		else{
			printf("不一致%d\n",n);
		}
	}
	return(0);
}

コード:

#include<stdio.h>
int shori(int i)
{
	int m=0;
	if (i>0){
	    while(i>0){
		m=m*10+i%10;
		i/=10;
	    }
	}
	return(m);
}
int main(void)
{
	int n,m,k,i;
	for(n=100;n<=199;n++){
		i=n;
		k=0;
		printf("%d\n",n);
		m=shori(i);
		while(i!=m){
			i=i+m;
			k++;
			if(k==50)break;
			m=shori(i);
		}
		if(i==m){
			printf("\n");
		}
		else{
			printf("不一致%d\n",i);
		}
	}
	return(0);
}

コード:

177
   1: 177 + 771 = 948
   2: 948 + 849 = 1797
   3: 1797 + 7971 = 9768
   4: 9768 + 8679 = 18447
   5: 18447 + 74481 = 92928
   6: 92928 + 82929 = 175857
   7: 175857 + 758571 = 934428
   8: 934428 + 824439 = 1758867
   9: 1758867 + 7688571 = 9447438
   10: 9447438 + 8347449 = 17794887
   11: 17794887 + 78849771 = 96644658
   12: 96644658 + 85644669 = 182289327
   13: 182289327 + 723982281 = 906271608
   14: 906271608 + 806172609 = 1712444217
   15: 1712444217 + 7124442171 = 8836886388

187
   1: 187 + 781 = 968
   2: 968 + 869 = 1837
   3: 1837 + 7381 = 9218
   4: 9218 + 8129 = 17347
   5: 17347 + 74371 = 91718
   6: 91718 + 81719 = 173437
   7: 173437 + 734371 = 907808
   8: 907808 + 808709 = 1716517
   9: 1716517 + 7156171 = 8872688
   10: 8872688 + 8862788 = 17735476
   11: 17735476 + 67453771 = 85189247
   12: 85189247 + 74298158 = 159487405
   13: 159487405 + 504784951 = 664272356
   14: 664272356 + 653272466 = 1317544822
   15: 1317544822 + 2284457131 = 3602001953
   16: 3602001953 + 3591002063 = 7193004016
   17: 7193004016 + 6104003917 = 13297007933
   18: 13297007933 + 33970079231 = 47267087164
   19: 47267087164 + 46178076274 = 93445163438
   20: 93445163438 + 83436154439 = 176881317877
   21: 176881317877 + 778713188671 = 955594506548
   22: 955594506548 + 845605495559 = 1801200002107
   23: 1801200002107 + 7012000021081 = 8813200023188

コード:

#include <stdio.h>
 
#define SIZE  30

void reverse(const char *x, char *y)
{
    int i, j;
    for (i = SIZE; --i > 0 && x[i] == 0; ) y[i] = 0;
    for (j = 0; i >= 0; i--, j++) y[j] = x[i];
}

void add(const char *x, const char *y, char *z)
{
    int i, carry = 0;;
    for (i = 0; i < SIZE; i++) {
        z[i] = x[i] + y[i] + carry;
        carry = (z[i] >= 10);
        if (carry) z[i] -= 10;
    }
}

void print(const char *x)
{
    int i = SIZE;
    while (--i > 0 && x[i] == 0) ;
    while (i >= 0) putchar(x[i--] + '0');
}

void set(int n, char *x)
{
    int i;
    for (i = 0; i < SIZE; i++) x[i] = n % 10, n /= 10;
}

void test(int n) 
{
    char x[SIZE], y[SIZE], z[SIZE];
    int k;
    printf("%d\n", n);
    set(n, x);
    for (k = 0; k < 50; k++) {
        reverse(x, y);
        if (memcmp(x, y, SIZE) == 0) {
            return;
        }
        add(x, y, z);
        printf("   %d: ", k + 1), print(x), printf(" + ");
        print(y), printf(" = "), print(z), printf("\n");
        memcpy(x, z, SIZE);
    }
    printf(" %d -- Lychrel number?\n", n);
}

int main(void)
{
    int i;
    for (i = 175; i <= 199; i++) test(i);
    return 0;
}