#include <stdio.h>
int main(void)
{
char str1[40] = "AAA";
char str2[] = "BBBB";
int str1Length = 0;
int str2Length = 0;
while (str1[str1Length])
str1Length++;
while (str2[str2Length])
str2Length++;
if(sizeof str1 < str1Length + str2Length + 1)
printf("\n str1 is too short.");
else
{
str2Length = 0;
while(str2[str2Length]){
str1[str1Length++] = str2[str2Length++];
}
str1[str1Length] = '\0';
printf("\n%s\n", str1 );
}
return 0;
}
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