‘\0'的单引号/输入字符串/输出单个字符
while(targetchar[n]!='\0')
char givenchar[256];
int m=0;
//printf("Input given character string\n");
gets(givenchar);
while(givenchar[m]!='\0')
m++;
printf("%c",a[0][j]);
while(targetchar[n]!='\0')
char givenchar[256];
int m=0;
//printf("Input given character string\n");
gets(givenchar);
while(givenchar[m]!='\0')
m++;
printf("%c",a[0][j]);