C语言程序 设计

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

char* MulAdd(char* s1, char *s2, char *s3)
{
int i,j;

strrev(s1);
strrev(s2);

for (i=0; s1[i] && s2[i]; i++)
{
s3[i] += s1[i]+s2[i]-'0';
if (s3[i] > '9')
{
s3[i] -= 10;
s3[i+1]++;
}
}

j = i;
if (s1[i])
{
for (; s1[j]; j++)
s3[j] += s1[j];
}
else if (s2[i])
{
for (; s2[j]; j++)
s3[j] += s2[j];
}

if (s3[j])
s3[j] += '0';

strrev(s1);
strrev(s2);
strrev(s3);

return s3;
}

void main()
{
char s1[100]={""};
char s2[100]={""};
char s3[100]={""};

printf("input1:");
scanf("%s", s1);
printf("input2:");
scanf("%s", s2);

MulAdd(s1,s2,s3);

printf("%s", s3);
}

#include <stdio.h> #include <time.h> #include <math.h> #include <stdlib.h> #define MAX 50

int main(void)

{ int num1,num2; srand(time(NULL)); num1 = rand()%MAX; num2 = rand()%MAX; printf("num1 = %d,num2 = %d,sum = %d\n",num1,num2,num1+num2); return 0; }