cstructCensus, C (gcc)

Language: Layout:

//gcc 7.4.0

//define a structure named census with a character array named city to store name of the citied,a long integer member named popl to store population of the city and a float member named lit to store literacy rate;
//then write a program to read details for 5 cities,sort the list alphabetically,sort the list based on population, sort the list based on literacy level, display sorted list

//this code is created by Rezaul Hoque on August 13,2021;contact: jewelmrh@yahoo.com
//note: codes shared by Rezaul Hoque on rextester are not for sale; they are created and shared to facilitate the algorithm learning process; many like Hoque use this platform to practice programming ;Rezaul hopes his contribution helps others to fine tune their learning;

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
const int n=5;
 struct census{
char city[30];
 long int popl;
float lit;
};

void sortNam(struct census []);
void sortPop(struct census []);
void sortLit(struct census []);
void display(struct census []);
void display(struct census cen[5]){
printf("City\tPopulation\tLiteracy:\n");
for(int k=0;k<n;k++)
printf("%5s\t%5ld\t%10.2f\n",cen[k].city,cen[k].popl,cen[k].lit);
}
void sortNam(struct census cen[5]){
char temp[30];
for(int l=1;l<=n;l++)
{
  for(int j=1;j<=n-l;j++)
  {
    if(strcmp(cen[j-1].city,cen[j].city)>0){
strcpy(temp,cen[j-1].city);
strcpy(cen[j-1].city,cen[j].city);
strcpy(cen[j].city,temp);

long int temp1=cen[j-1].popl;
cen[j-1].popl= cen[j].popl;
cen[j].popl = temp1;

int temp2 =cen[j-1].lit;
cen[j-1].lit= cen[j].lit;
cen[j].lit = temp2;
}

}
}
printf("After City Sort:\nCity\t Population\t Literacy\n");
for(int k=0;k<n;k++)
printf("%5s\t%5ld\t%10.2f\n",cen[k].city,cen[k].popl,cen[k].lit);
}
void sortPop(struct census cen[5]){
char temp[30];
for(int l=1;l<n;l++)
{
  for(int j=1;j<=n-l;j++)
  {
 if(cen[j-1].popl>cen[j].popl)
{
long int temp1=cen[j-1].popl;
cen[j-1].popl= cen[j].popl;
cen[j].popl = temp1;

int temp2 =cen[j-1].lit;
cen[j-1].lit= cen[j].lit;
cen[j].lit = temp2;

strcpy(temp,cen[j-1].city);
strcpy(cen[j-1].city,cen[j].city);
strcpy(cen[j].city,temp);
}
  }
}

printf("After Population Sort:\n");
printf("City\tPopulation\tLiteracy\n");
for(int k=0;k<n;k++){
printf("%5s\t%5ld\t%10.2f\n",cen[k].city,cen[k].popl,cen[k].lit);}
}

void sortLit(struct census cen[5]){
char temp[30];

for(int l=1;l<n;l++)
{
  for(int j=1;j<=n-l;j++)
  {
 if(cen[j-1].lit>cen[j].lit){
strcpy(temp,cen[j-1].city);
strcpy(cen[j-1].city,cen[j].city);
strcpy(cen[j].city,temp);

long int temp1=cen[j-1].popl;
cen[j-1].popl= cen[j].popl;
cen[j].popl = temp1;

int temp2= cen[j-1].lit;
cen[j-1].lit= cen[j].lit;
cen[j].lit= temp2;
  }
}
  }

printf("After Literacy Sort:\nCity\tPopulation\tLiteracy\n");
for(int k=0;k<n;k++)
printf("%5s\t%5ld\t%10.2f\n",cen[k].city,cen[k].popl,cen[k].lit);
}

int main(){
struct census cen[5];
printf("Enter city name,population and literacy rate:\n");
for(int k=0;k<n;k++){
scanf("%s\t%ld\t%f\n", cen[k].city,&cen[k].popl,&cen[k].lit);
}
display(cen);
sortNam(cen);
sortPop(cen);
sortLit(cen);
return 0;
}

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Compilation time: 0.22 sec, absolute running time: 0.15 sec, cpu time: 0.01 sec, memory peak: 5 Mb, absolute service time: 0,49 sec