C语言实现整数转化为字符串

C语言实现整数转化为字符串

转化函数

整数转化为字符串

char *int_to_str(int x, char *str) {
	char ch, *p;
	int sign = 0, r;
	p = str;
	if (x < 0) {    //处理负数
		sign = 1;
		x = -x;   
	}
	while (x > 0){		//取余实现倒序
		r = x % 10;
		x = x / 10;
		*p = 48 + r;	
		p++;
	}
	if (sign == 1)
		*p++ = '-';
	*p = '\0';
	return str_reverse_arr(str);	//将字符串逆序得到原先顺序
}
//字符串逆置（数组）
char *str_reverse_arr(char *s) {
	char t;
	int low = 0, high = strlen(s) - 1;
	while (low < high) {
		t = s[low];
		s[low] = s[high];
		s[high] = t;
		low++;
		high--;
	}
	return s;
}

main函数

int main() {
	char ch[40];
	int x = -16651623;
	printf("x = %d\n", x);
	printf("ch = ");
	puts(int_to_str(x, ch));
	return 0;
}	

输出