//Use scanf to read in the difference between character strings, single characters, and numbers
//The dimension reduction of two-digit arrays is very convenient
#include<stdio.h>
#include<string.h>
void main(){
int n;
while(~scanf("%d",&n)&&n){
//会在缓冲区留下一个换行符
// getchar();不需要它的原因③
char b[1005][20];
int max=0,maxi,i,j,count;
for(i=0;i<n;i++){
scanf("%s",b[i]);//即使前面没有getchar，由于类型是字符串，不会读取前面的getchar，下面一个同理
// getchar();不需要它的原因③
}
for(i=0;i<n;i++){
count=0;
for(j=0;j<n;j++)
if(strcmp(b[i],b[j])==0) count++;
if(count>max) {
max=count;maxi=i;}
}
printf("%s\n",b[maxi]);
}
}
Summary
//Use scanf("%c",&c) to read c (c is a char type). If there is a newline character or space before reading, then c will read the newline character or space of the previous buffer, The solution is to getchar() first;
//If you use scanf("%s",str) to read str(char str[] or char str[][]), even if the buffer has a newline character or Spaces will not be read;
//Other numeric types have no such problems.
#include<stdio.h>
#include<string.h>
void main(){
int repeat;
scanf("%d",&repeat);
getchar();//用getchar()的原因①
while(repeat--){
char s[1000],c;
gets(s);
//不用加getchar()的原因②
scanf("%c",&c);
getchar();//用getchar()的原因①
printf("result: ");
for(int i=0;i<strlen(s);i++){
if(s[i]==c) continue;
else printf("%c",s[i]);
}
printf("\n");
}
}
Summary
// Before receiving: ③scanf("%s",s) receives the string and automatically discards the carriage return in the buffer,
①but gets(s) will receive the carriage return in the buffer; //After receiving: ②gets(s) The carriage return used to end the input will be discarded, and scanf("%s",s) will leave a carriage return in the buffer;
//scanf ends an input with space, enter, and tab, and will not discard the last terminator (left in the buffer);
//getchar ends the input with enter, and will not discard the last terminator (left in the buffer);
/ /gets End input with enter, enter will be discarded.