Parse GPS String for Time and Coordinates

Code

#include <stdio.h>
#include <string.h>

void parse_gprmc(char *nmea) {
    // Your logic here
    //check for the starting $GPRMS identifier
    int i=0;
    char *token;
    char *fields[7];
    token = strtok(nmea, ",");

    while(token != NULL && i < 7){
        fields[i++] = token;
        token = strtok(NULL, ",");
    }
    int hour,minute,seconds;
    if(i>= 3 && strcmp(fields[2],"A") == 0){
        //printf("--- GPRMC Data ---\n");
        // Time (HHMMSS.SSS)

        sscanf(fields[1],"%2d%2d%2d",&hour,&minute,&seconds);
        printf("Time: %02d:%02d:%02d\n", hour,minute,seconds);

        // Latitude (DDMM.MMMM format)
        printf("Latitude: %s %s\n", fields[3], fields[4]);

        // Longitude (DDDMM.MMMM format)
        printf("Longitude: %s %s\n", fields[5], fields[6]);
    }
    
}

int main() {
    char nmea[100];
    fgets(nmea, sizeof(nmea), stdin);
    parse_gprmc(nmea);
    return 0;
}

Solving Approach

 

 

 

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Input

$GPRMC,123519,A,4807.038,N,01131.000,E

Expected Output

Time: 12:35:19 Latitude: 4807.038 N Longitude: 01131.000 E