单选题有以下程序:#include #include main(){ char a[20]=ab,b[20]=cdef; int k=0; strcat(a,b); while(a[k]!='\0') {  b[k]=a[k];  k++; } puts(b);}程序的运行结果是(  )。AabcdefBcbcdefCcdefDab

单选题
有以下程序:#include #include main(){ char a[20]=ab,b[20]=cdef; int k=0; strcat(a,b); while(a[k]!='\0') {  b[k]=a[k];  k++; } puts(b);}程序的运行结果是(  )。
A

abcdef

B

cbcdef

C

cdef

D

ab


参考解析

解析:
strcat把字符串a,b连接起来放在数组a中,while语句再将字符串a赋给字符串b。答案选择A选项。

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