atoi是把字符串转换为int型数据
atof是转换为float型
strtok是分隔字符串的
第一个例子用了sscanf， 没有用strtok#include
#include
#include
#include
#defineMAX_Line2048
intmain(){
FILE*Fr;
Fr=fopen("test_Group_Box.txt","r");
if(NULL==Fr){
printf("ERROR!\n");
return-1;
}
floatt;
charTest_N_arr[MAX_Line];
//char*Test_N_arr=(char*)malloc(sizeof(char)*MAX_Line);
charstr1[50],str2[50],str3[50];
//charstr1,str2,str3;
//"ReadEachLineofFrandassigneachfieldstothreepointers"
while(!feof(Fr)){
fgets(Test_N_arr,MAX_Line,Fr);
sscanf(Test_N_arr,"%s\t%s\t%s",str1,str2,str3);
t=atof(str3);
printf("%s\t",str1);
printf("%s\t",str2);
if(strcmp(str1,"Group")==0){
printf("%s\n",str3);
}else{
printf("%.2f\n",t);
}
}
fclose(Fr);
//free(Test_N_arr);
return0;
}
另一个例子用了strtok#include
#include
#include
#include
#defineMAX_Line2048
intmain(){
FILE*Fr;
Fr=fopen("test_Group_Box.txt","r");
if(NULL==Fr){
printf("ERROR!\n");
return-1;
}
floatt;
char*Test_N_arr=(char*)malloc(sizeof(char)*MAX_Line);
char*str;
//"ReadEachLineofFrandassigneachfieldstothreepointers"
while(!feof(Fr)){
fgets(Test_N_arr,MAX_Line,Fr);
str=strtok(Test_N_arr,"\t");
inti=0;
while(str!=NULL){
if(i==2){
if(strcmp(str,"Qual\n")==0){
printf("%s",str);
}else{
t=atof(str);
printf("%.2f\n",t);
}
}else{
printf("%s\t",str);
}
i++;
str=strtok(NULL,"\t");
}
}
fclose(Fr);
free(Test_N_arr);
return0;
}
